And it would be bloody.
The United States has substantial air, land, and sea forces stationed in South Korea, as well as several units based in Japan and the western Pacific earmarked for a Korean contingency. Together, these forces far exceed the firepower of North Korea’s armed forces and represent a powerful deterrent not just against Pyongyang but any potential adversary in the region.
The first U.S. forces that would be involved in a North-South Korean conflict are those currently based in South Korea. On the ground, the U.S. Army rotates a new armored brigade into South Korea every nine months—currently the 2nd Brigade Combat Team, 1st Cavalry Division. Each brigade is manned by 3,500 soldiers and consists of three combined arms battalions, one cavalry (reconnaissance) battalion, one artillery battalion, one engineer and one brigade support battalion. Armored brigade combat teams typically consist of approximately 100 M1A2 Abrams tanks, 100 M2A3 Bradley infantry fighting vehicles and eighteen M109-series self-propelled howitzers.
The army in South Korea also maintains the 2nd Infantry Division’s Combat Aviation Brigade, equipped with approximately sixty Apache attack helicopters, Blackhawk and Chinook transports. The 210th Artillery Brigade, equipped with M270 Multiple Launch Rocket Systems provides long range artillery fire, while the 35th Air Defense Artillery Brigade provide Patriot missile coverage of Osan and Suwon Air Force Bases. The 35th Brigade also operates the AN/TPY-2 missile defense radar and six Theater High Altitude Area Defense (THAAD) launch vehicles recently sent to the country to beef up anti-missile defenses.