The u. s. got involved in this caribbean island nations politics to try and keep an socialist leader from power.

Explanation:

The US-Cuba relations deteriorated after the Cuban Revolution of 1959 and US severed diplomatic ties with Cuba in 1961 began operations to topple the Cuban government and also imposed restrictions against it as Cuban government had nationalised US corporations property in Cuba. Pigs of Bay invasion(1961) was a major step taken by US government to stop Fidel Castro's attempt to spread communism throughout Latin Africa and America.

explanation:

japan participated in world war i from 1914 to 1918 in an alliance with entente powers and played an important role in securing the sea lanes in the west pacific and indian oceans against the imperial german navy as the member of the allies.

"a government in which power is divided between state and national levels". federalism is a system of government in which entities such and state and province, share power with the national government.