So that the Panama Canal could be built. This would make it easier for the United States to move their ships from the Atlantic to the Pacific and vice versa.
Can you explain to me in the comments so i can answer you question
I think that the US did have the right to prevent the spread of communism. Any nation that turned communist (except for Yugoslavia) turned out to be because the Soviets arranged it to threaten the US. For example; the Soviets used Cuba to place missiles in the Americas, and China used Vietnam to threaten NATO outposts in the South China Sea. Any nation that was communist was clearly aligned with the USSR, and determined to threaten the US.
First of all , most definitely A because its an empire. and B because the emperors like Julius Caesar took power away from the Senate