Which conflict saw the RPG-2 as the main anti-tank weapon for the Vietcong forces?

The RPG-2 was widely used by the Vietcong forces during the Vietnam War, which took place from the late 1950s to 1975. The weapon was designed as a portable, shoulder-fired anti-tank grenade launcher, ideal for guerrilla warfare tactics. Its design allowed for effective engagement of armored vehicles and was well-suited for the dense jungles and difficult terrain of Vietnam.

During the Vietnam War, the Vietcong needed effective anti-tank solutions to combat U.S. and South Vietnamese armored forces. The RPG-2 provided a relatively lightweight and easy-to-use option that could be employed by infantry fighters, allowing them to strike at enemy tanks and other armored vehicles effectively.

The other conflicts listed do not align with the use of the RPG-2. World War I and World War II occurred long before the RPG-2 was developed in the early 1950s, and during the Gulf War, other advanced anti-tank weaponry was prevalent, overshadowing earlier systems like the RPG-2. Thus, the correct answer reflects the historical context in which the RPG-2 played a significant role in anti-tank operations.