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Nghe/Video/The Infographics Show/Which US State Is Impossible to Invade

Which US State Is Impossible to Invade

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0:00The United States can defend itself  against almost any country on Earth.  
0:03But what if every state had to  stand alone? Here are the states  
0:07that could best fight off an invasion  - and one that simply wouldn’t fall.
0:11Before we get to the states that could actually  hold out, two would collapse almost immediately.
0:1612. Delaware
0:18The first and most glaring issue with  Delaware is its size. It covers about  
0:222,500 square miles (6,475 sq km), making  it the second-smallest state in the entire  
0:26country. At its widest point, the state  is just about 35 miles (56 km) across.  
0:30That means a modern mechanized force could  cross the entire state in a matter of hours.
0:35And the geography makes things even worse.
0:37Delaware is one of the flattest regions in  North America. There are no mountain ranges,  
0:42no dense forests, no swamps, and virtually no  natural chokepoints - it’s a welcome mat for an  
0:47invading army. Delaware’s population is just  over 1 million people, ranking it among the  
0:52least-populated states in the U.S, - and that  means available manpower for defense would be  
0:57extremely limited. Militarily, Delaware has  very little standing combat power of its own.  
1:02The state has no major active-duty U.S. Army,  Navy, or Marine Corps bases within its borders.
1:07Delaware wouldn’t slow an invasion - it would  barely register. The next state isn’t much better.
1:1311. Rhode Island
1:15Rhode Island also has a size problem,  
1:17covering around 1,200 square miles  (3108 sq km). From border to border,  
1:20an invading force could move across the state in  well under a day. The state has a long, indented  
1:25coastline dominated by Narragansett Bay - one of  the largest natural harbors on the East Coast.
1:30While that geography has historically been an  economic asset, from a combat point of view,  
1:34it’s a huge liability. The bay creates  dozens of amphibious landing sites,  
1:38and the surrounding low-lying coastal  terrain offers few natural obstacles.
1:43When the bullets start to fly, Rhode Island brings  
1:45very little to the fight. But from  here on out, the picture changes.
1:4910. Pennsylvania
1:50Pennsylvania marks the transition point  - not because it’s impossible to invade,  
1:54but because it would be extremely  hard to hold. The state’s biggest  
1:58strength is its central location and  massive infrastructure footprint.
2:01Most of the state is shaped by the  Appalachian Mountains, including long,  
2:05ridge-and-valley systems that funnel movement  into predictable routes. These ridges, combined  
2:10with narrow river valleys, create ready-made  defensive lines, chokepoints, and ambush zones.
2:15Population is where Pennsylvania truly  starts to separate itself from easier  
2:19targets. With a population of around 13  million people, it has plenty of manpower.  
2:24Large urban centers like Philadelphia  and Pittsburgh act as industrial and  
2:28transportation hubs - then there’s the dozens of  mid-sized cities and towns filling the interior.
2:34Pennsylvania punches well above  its weight at the state level.
2:37The crown jewel is Fort Indiantown Gap - one of  the largest and busiest National Guard training  
2:42centers in the United States, supporting  training for more than 100,000 troops a  
2:46year. That makes Pennsylvania a major center  for mobilization and sustained operations.
2:51But some states don’t need massive bases -  their defenses are built into the ground.
2:569. Colorado
2:58Colorado stands out as a state where  terrain and strategic infrastructure  
3:01gives the advantage to defenders. The  Rocky Mountains dominate the western and  
3:05central portions of the state. Much of  Colorado sits at elevations above 5,000  
3:10feet (1,524 meters), with over 50 peaks  exceeding 14,000 feet (4,267 meters). This  
3:13mountainous interior severely restricts  large-scale movement for any opposing forces.
3:18The Colorado Springs region hosts some  of the most critical command, control,  
3:22and early-warning infrastructure in the United  States. Facilities such as Peterson Space Force  
3:27Base often support critical missions, while the  Cheyenne Mountain Complex remains one of the  
3:31most famous hardened military facilities  in the world. Then there is Fort Carson  
3:36Army Base and the United States Air Force  Academy, which means Colorado would have  
3:41both ground and air forces at their disposal. Colorado’s interior position adds another layer  
3:46of defense. With no coastline and long distances  to any entry point, an invading force would have  
3:51to fight deep inland through rugged terrain  before reaching anything that actually matters. 
3:56Paired with a strong National Guard presence and  a population comfortable in high-altitude terrain,  
4:01Colorado gives defenders time, space, and  advantages an attacker can’t easily overcome.
4:06And if you think Colorado's terrain is formidable,  
4:09in this next state the people  are the first line of defense.
4:128. New York
4:14New York has a population of about 19.5 million  people, making it the fourth-most populous state  
4:19in the United States. That concentration of  people translates directly into manpower,  
4:24logistical capacity, and resistance potential  - which makes sense if you’ve met a New Yorker.
4:29New York’s geography combines major ports,  inland rivers, and rugged terrain. The Hudson  
4:33River forms a natural north–south corridor that  is both strategically vital and defensible.  
4:38Meanwhile, regions like the Appalachian  highland and Adirondack mountains break  
4:42up movement and create defensible  interior zones far from the coast.
4:46New York also has substantial in-state  forces capable of immediate response.  
4:50Fort Drum is home to elements  of the 10th Mountain Division,  
4:53one of the U.S. Army’s most combat-experienced  and rapidly deployable light infantry formations.  
4:58Trained for cold weather and rugged  terrain, the division is tailor-made  
5:02for the conditions an invader would  face in New York’s north and interior.
5:06But New York’s true defensive nightmare for any  invader is urban terrain. New York City alone  
5:11contains around 300 square miles (777 sq km)  of dense urban development - subways, tunnels,  
5:16bridges, high-rise buildings, and underground  infrastructure. Urban environments like these  
5:20overwhelmingly favor defenders, and in a city of  this size, even a small fraction of the population  
5:26resisting could tie down occupying forces. Every  block becomes a chokepoint, every building a  
5:31potential stronghold, and every transportation  artery a vulnerability for an occupier.
5:35If New York is hard to take, the next  state levels up - and adds gators. 
5:407. Florida
5:42Florida looks easy on a map. In reality,  it’s an occupation nightmare. The first  
5:46challenge is sheer exposure. Florida has  over 1,300 miles (2,092 km) of coastline.  
5:51It’s surrounded by the Atlantic Ocean  and the Gulf of America - formerly the  
5:54Gulf of Mexico. This creates dozens  of potential landing sites that are  
5:58impossible to defend all at once - but just as  hard for an attacker to control after landing.
6:03The Sunshine State is home to about 22 million  people… and some of them are Florida Man - and  
6:08he comes packing. Florida has one of the largest  civilian firearm populations in the United States,  
6:13with millions of privately owned guns. While  this doesn’t replace organized military force,  
6:18it significantly lowers the chances of occupation  and pacification - especially in suburban sprawl.
6:25Militarily, Florida has Macdill Air Force Base  in Tampa, which is one of the most strategically  
6:29important air installations in the U.S. It hosts  U.S. Central Command and U.S. Special Operations  
6:35Command headquarters, along with major aerial  refueling and airlift units. That makes MacDill  
6:40a vital logistics, command, and coordination hub  - and a high-value, heavily protected target.
6:46Then there’s the terrain no invading force  wants to deal with: The Everglades. Covering  
6:51approximately 1.5 million acres (607,028  hectares), this expanse of swamps, wetlands,  
6:55and sawgrass marshes is a nightmare for  occupying forces. Roads are limited,  
6:59visibility is poor, and the environment  itself becomes an enemy. And of course,  
7:03there is always the risk of  being attacked by alligators.
7:06Up to this point, invasion has  been difficult. From here on out,  
7:10it becomes strategically reckless.
7:126. Washington State
7:14Washington’s rugged, irregular coastline along  the Pacific Ocean creates a natural barrier,  
7:19while Puget Sound forms a highly  defensible maritime environment.  
7:22Any invading force attempting a coastal  landing would immediately face numerous  
7:26chokepoints and navigational hazards. That  immediately rules out surprise assaults.
7:31Strategically, Washington is home to Joint  Base Lewis–McChord (JBLM), one of the largest  
7:37military installations in the continental United  States. JBLM hosts tens of thousands of Army and  
7:43Air Force personnel, along with extensive  training ranges, airlift capabilities, and  
7:47rapid deployment units. That makes it a powerful  hub for regional defense and force projection.
7:53Inland, Washington is far from easy  terrain. The state is dominated by  
7:57the Cascade and Olympic mountain ranges, which  form natural defensive barriers. Combined with  
8:01the state’s significant National Guard presence  and access to airlift and logistics through JBLM,  
8:07these geographic features multiply the  problems an invading force would face.
8:11And this is where the list  stops being theoretical.
8:145. Virginia
8:16At this point, invasion stops being about terrain  
8:19and starts being about concentration.  Virginia is where that becomes obvious.
8:23Geographically, the state offers layered  defensive terrain. The eastern portion  
8:27includes the complex Atlantic coastline  - filled with estuaries, inlets, rivers,  
8:31and peninsulas. Inland, the terrain rises into the  Blue Ridge Mountains and Appalachian foothills,  
8:36where ridgelines, forests, and narrow  valleys create natural defensive lines.
8:40Virginia’s military footprint is one of  the largest in the nation. The state is  
8:44home to Naval Station Norfolk, the  largest naval base in the world.  
8:48Nearby facilities such as Langley Air Force  Base, Marine Corps Base Quantico, Fort Belvoir,  
8:53and Fort Gregg-Adams host Army, Air Force, Marine  Corps. Good luck getting an easy victory here.
8:58Virginia packs power into a small space,  
9:01but the next state spreads it across  an entire continent-sized area.
9:054. California
9:06California ranks near the top of the  hardest-to-invade states because it  
9:10combines a massive population, strategic  military infrastructure, and complex terrain.  
9:15The state is home to around 40 million  people, making it the most populous state  
9:19in the United States. This provides an enormous  pool of potential defenders - both in terms of  
9:24organized military personnel and civilian manpower  capable of supporting resistance or insurgency.
9:29Geographically, California presents a variety of  natural defenses. The state has a long coastline  
9:34along the Pacific Ocean, stretching over 800  miles (1287 km) punctuated by major ports  
9:39including San Diego, Los Angeles, and Oakland.  These are critical for both defense and supply,  
9:45enabling rapid reinforcement, resupply, and  power projection along the coast. Inland,  
9:49the Sierra Nevada mountain range and numerous  valleys create natural defensive corridors.
9:54California’s military infrastructure is equally  formidable. The state hosts Naval Base San Diego,  
10:00the largest Navy base on the West  Coast. Then there’s Camp Pendleton,  
10:04a major Marine Corps installation, Edwards Air  Force Base, a premier test and training facility,  
10:09and National Training Center at Fort Irwin  - one of the largest and most advanced Army  
10:13training areas in the country. These bases  support thousands of combat-ready troops,  
10:18aviation assets, armored units,  and extensive training programs.
10:21The state’s technology, energy, and  manufacturing sectors provide the  
10:25ability to sustain resistance, repair  infrastructure, and coordinate defenses  
10:29even under prolonged pressure. Combined with  mountains, deserts, and coastal defenses,  
10:34California becomes extremely hard to seize  and nearly impossible to hold completely.
10:39The next state turns the battlefield  into a war of distance - and endurance.
10:433. Texas
10:45Everything is bigger in Texas - and that causes  a problem for any invasion force. With a land  
10:50area of around 268,000 square miles (694116  sq km), it is the second-largest state in the  
10:55United States. It’s larger than France. This  massive size gives defenders enormous depth,  
11:00making it impossible for an invading force  to quickly take over the entire state. Add  
11:05in a population of 30 million people,  and Texas also provides a vast manpower  
11:09pool for both organized military  units and local resistance efforts.
11:13Texas is also heavily militarized. The state  hosts multiple major Army and Air Force bases,  
11:19including Fort Hood, Joint Base San  Antonio, and Fort Bliss. These bases  
11:23serve as hubs for deployment, logistics, and  sustained combat operations, giving Texas the  
11:28ability to defend itself, counterattack, and  maintain operations deep into its territory.
11:34Additionally, Texas’ interstate highways,  
11:36rail networks, and energy infrastructure  create internal logistical resilience,  
11:40allowing defenders to move troops, equipment,  and supplies efficiently across vast distances.
11:46And after Texas, invasion stops  being a land problem at all.
11:492. Hawaii
11:51Located roughly 2,400 miles  (3,862 km) from the U.S. mainland,  
11:55Hawaii is completely isolated in  the middle of the Pacific Ocean.  
11:58Any invasion would require a massive  sealift or airlift operation. That  
12:02alone creates a logistical nightmare. Supply  lines would be extremely vulnerable, and any  
12:07delay or disruption could doom an invading  force before it even reaches the islands.
12:12The state’s geography places the odds  on the side of the defender. Hawaii is  
12:15an archipelago of islands, each with rugged  volcanic terrain, steep cliffs, and limited  
12:20beaches suitable for amphibious landings.  Urban areas are limited and concentrated,  
12:25while interior regions are mountainous and covered  in dense tropical vegetation - perfect for any  
12:30counterinsurgency. Enemy forces attempting  to capture the islands would be funneled into  
12:34narrow beachheads, making them susceptible to  defensive fire, counterattacks, and attrition.
12:39Military infrastructure in Hawaii is formidable.  Pearl Harbor, on Oahu, serves as the headquarters  
12:45of the U.S. Pacific Fleet. Adjacent Joint Base  Pearl Harbor–Hickam integrates air and sea power,  
12:50providing both defensive and rapid-response  capabilities. These bases also function as  
12:55critical logistics nodes, allowing defenders to  quickly reinforce positions and resupply units.
13:00The presence of such hardened and well-coordinated  military assets ensures that any invading force  
13:05would face a highly capable and prepared  defender from the very first landing.
13:10And now we reach the state that  breaks every invasion model.
13:141. Alaska
13:16At the very top of the list is Alaska, a state  that combines enormous size, harsh terrain,  
13:21and extreme isolation. It spans roughly 586,000  
13:24square miles (1.5 million sq km), making it  larger than Texas and California combined.
13:28Its interior and northern regions  are dominated by Arctic and subarctic  
13:32environments, including mountain ranges,  glaciers, tundra, and dense forests.  
13:37Winter conditions can be extreme, creating  additional obstacles for any invading force.
13:42Population density is another critical factor.  Alaska is home to only around 740,000 people,  
13:48resulting in an average of 1.2 people per  square mile (0.46 per sq km), among the  
13:52lowest in the United States. This sparse  population means that an invader could  
13:56not rely on local resources for logistics  or occupation support. Roads are limited,  
14:02particularly outside urban centers,  and much of the state is accessible  
14:05only by air or sea - supply lines would  be long, tenuous, and highly vulnerable.
14:10The coastline further complicates  any potential invasion. Alaska has  
14:14over 6,600 miles (10,621 km) of mainland  coastline, creating countless potential  
14:18landing sites that would require monitoring  or defense. The interior and coastal islands,  
14:23often rugged and difficult to navigate,  provide natural defensive depth and numerous  
14:28areas for defenders to stage ambushes,  guerrilla operations, or counterattacks.
14:32Alaska also hosts significant military  assets geared toward defense and early  
14:37warning. Joint Base Elmendorf–Richardson and  Eielson Air Force Base support air defense,  
14:42rapid deployment, and Arctic-capable units.  Meanwhile a network of early-warning radar  
14:47installations provides extensive surveillance  of northern approaches. These facilities,  
14:51combined with highly trained personnel  accustomed to extreme conditions, ensure  
14:55that any invading force would face well-prepared  defenders in terrain that favors the home force.
15:01Now watch “THIS is How the US Will Defend the  
15:03Homeland From an Invasion.” Or check  out “Countries Easiest to Invade.”