Miguel Díaz-Canel told crowds in Havana the US is trying to undermine Cuba’s political system.
He announced the US seeks full control across Cuba.
Díaz-Canel described US policies a type of political genocide during July 26 events.
He emphasised this is a threat to the country's right to govern.
Raúl Castro stayed away from the biggest rally.
Tensions stay high due to sanctions and American political pressure.