When did fidel castro take power, and what immediate actions did he take to upset relations between cuba and the united states

After taking power in 1959, Fidel Castro began seizing private land on the island and turning it into public land. This action damaged American economic interests in Cuba. Castro also began raising taxes on American products, which hurt American commerce in Cuba. Both actions created a tense relationship between the two nations.

i think the answer to your question is: settlement of the interior and economic growth. ( ^_^)／