How did fidel castro became involved in revolutionary activities?

In 1945, Castro began the study of law in Cuba's capital, Havana. While at law school, he became involved in revolutionary activities.

After graduating from law school, Castro joined a reformist political party and ran for a seat in the Cuban House of Representatives. However, just before the elections, an army general named Fulgencio Batista overthrew the government and grabbed power for himself.