Miguel Díaz-Canel spoke to crowds in Havana the US is trying to destroy Cuba’s political system.
He announced America aims for complete control across the nation.
Díaz-Canel described American policies a form of political genocide during July 26 events.
He emphasised this is a menace to Cuba’s right to govern.
Raúl Castro stayed away from the biggest rally.
Tensions remain high due to sanctions and US political pressure.