Not sure what wat you refer to...but after WWI the US saw themselves in the Great Depression due to self economic dispute and the the deal to fund Germany which would pay back France and Britain. After WWII they almost immediately entered the Cold War with the Soviet Union.
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new inventions change the life of people because it makes the whole world as a global village. it makes our work easier and faster.
Simply put, they were fighting an unpopular war that was against an enemy we basically couldn't see. We were fighting an enemy who would hide among the Vietnamese civilians. Many of the soldiers we were fighting were untrained farmers, however the fact they would not come out as soldier made it harder to root them out. They also knew the land better than us so they had the terrain to their advantage. The Vietnamese were just guerilla fighters, who we had issues with fighting because we could never tell who was an enemy. Often times, civilians would die due to the choices of these fighters, causing the Vietnam war to be very unpopular back at home. So our soldiers who had no morale to boost them back at home, were fighting an invisible enemy and then coming back home and being booed fr what thy did.
The Egyptians built the pyramids as tombs for pharaohs and their queens.
>>Learning about Ancient Egypt? Awesome! I loved that unit!
The Russian revolution had the effect of putting an end to the major arena of fighting on the Eastern Front In World War 1. it temporarily helped the Germans by freeing up the troops, but this advantage did not do the Germans much good throughout World War 1