What was the impact of u. s involvement in panamá

At the time it was built, the canal was an engineering marvel, relying on a series of locks that lift ships – and their thousands of pounds of cargo – above mountains. 

But thousands of workers died during its construction, and its history has seen no shortage of controversy, including a contentious transference of authority from the US to Panama in the 1970s. 

Work recently began on a substantial expansion effort that will allow the canal to accommodate modern cargo needs.    hope that helped

agriculture revolution

c. the passage of the fifteenth amendment