During the Korean War, what milestone is noted as the first combat test for Marine helicopters?

• A. Inchon landing
• B. First combat test for Marine helicopters
• C. Battle of Chosin
• D. Pusan Perimeter breakout

Answer: (B)

The main idea being tested is identifying the milestone that marks the first combat use of Marine helicopters. The best choice explicitly names that milestone, making it the direct fit for what the question asks. In the Korean War, Marines began employing helicopters in combat for the first time, proving their value for tasks like troop movement, resupply, and casualty evacuation in difficult terrain and under fire. This initial combat use showed how helicopters could extend battlefield mobility and medical and logistical support beyond what ground transport alone could achieve.

Other options refer to major events of the war, but they don’t name the specific milestone of the first combat test of Marine helicopters, so they don’t match what the question is asking about.