The correct answer is the catholic church.
After Rome's fall, the people of Europe turned to catholic church for stability and guidance.
It is during this fall that catholic churches continued to grow because,
1. Christianity was being proclaimed for the religion of masses.
2. The churches were organized socially, economically, and politically.
Roman empire split and Theodosius were the events which made christianity grew rapidly. Some of the reasons for the fall of Rome included,
1. Invasion by Barbarian tribes.
2. Overreliance on slave labour and economic troubles.
3. The rise of eastern empire.
Hope this helps :)
The answer is Louis and Clark
After the loss and withdraw of American troops from South Vietnam in 1976 during the Fall of Saigon the Viet Cong pushed into Saigon and took control of South Vietnam. Thus ending the "war" and South Vietnam being reunited with the North under one communist government
Back in the day, all railroads company demanded more land to build more railroads on top of the existing rails. Farmers that were organized would get state and federal laws passed that would regulate the railroads.
Hope I could help! :)