Which Korean War battle in 1950 exemplified USMC amphibious doctrine?

The Landing at Incheon is the correct answer as it is a prime example of USMC amphibious doctrine in action. This operation, conducted in September 1950, showcased the effectiveness of a well-executed amphibious assault, which was a hallmark of Marine Corps tactics. The Incheon landing was strategically significant because it allowed U.N. forces to establish a strong foothold behind North Korean lines, disrupting their supply lines and enabling a ground offensive to push them back.

The successful execution of this amphibious operation demonstrated the principles of maneuver warfare that the Marine Corps had developed and refined. The planning and execution involved careful coordination between naval and ground forces, highlighting the importance of joint operations and the ability to project power from the sea. This approach allowed U.S. forces to achieve surprise and decisively impact the course of the war.

In contrast, the other battles listed do not emphasize amphibious doctrine in the same way. For example, the Battle of Chosin Reservoir was noted for fierce ground combat in the harsh winter but did not include amphibious elements. The Battle of Pusan Perimeter and the Battle of Seoul, while significant, were more focused on ground engagements rather than the distinct amphibious operations that characterized the Incheon landing.