Americans started to sell weapons to nations at war, during the cold war because both the soviet union and the Americans start developing weapons like crazy and soon the Americans begun to sell the weapons to the western side of the earth for protecting the lands and others so that they can defeat the Taliban and etc. doesn't invade others countries and start a WW.
The US transfers to these countries are meant to ensure allies security, as arms transfers from the US brings with it security guarantees, which basically entail diplomatic and military assistance in case of troubles
Explanation:
During the Cold War, American arms sales became part of a broader strategy to deter the Soviet Union from invading Western Europe. In the wake of the 9/11 attacks, the United States sold weapons to Afghanistan and Iraq to bolster their ability to defeat the Taliban, al Qaeda, and the Islamic State.
The Iron Curtain was not actually a physical wall in most places, but it separated the communist and capitalist countries. The Berlin wall on the other hand was actually a wall that was built right through the middle of Berlin the capital of Germany.
