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What role did Che Guevara play in the Cuban Revolution?

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Fidel Castro stands on a makeshift balcony draped with Cuban flags, addressing a crowd in Santa Clara, Cuba, surrounded by supporters and armed revolutionaries. — Cuban Revolution Fidel Castro giving a speech from a makeshift balcony on January 1, 1959, en route to his victorious entry into Havana. Castro was known for his oratory skills.

Che Guevara was a key communist figure in the Cuban Revolution (1956–59). He joined Fidel Castro's 26th of July Movement, participating in the guerrilla warfare that ultimately overthrew Fulgencio Batista's dictatorship. Guevara became one of Castro's most trusted aides and, after the revolution, served in various prominent roles in the new Marxist government, including president of the National Bank of Cuba and minister of industry. He was a theorist of guerrilla warfare and a symbol of revolutionary action.12