Which technological items were first used by Marines during the Korean War?

The use of helicopters and flak jackets during the Korean War marked significant advancements in military technology for the Marines. Helicopters played a crucial role in providing mobility and support, allowing for the rapid transport of troops and supplies, as well as conducting medical evacuations. This was one of the first significant uses of helicopters in a combat scenario, changing the dynamics of battlefield operations and often referred to as a game-changer in modern warfare.

Flak jackets also played a vital role during the conflict, providing Marines with essential protection against shrapnel and small arms fire. This was a marked improvement in the personal protective equipment available to troops, enhancing their survivability on the battlefield. The implementation of these technologies helped shape future military engagements and influenced the development of subsequent military equipment.

In contrast, while other technologies like armored tanks and radar equipment were certainly present, they had been utilized in previous conflicts. Missiles and night vision gear were still in developmental stages or not widely used in the Korean War, which is why the correct answer highlights the introduction of helicopters and flak jackets as pivotal innovations for the Marines during that time.