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A blockade of Cuba was a bit more to scale than a blockade of Venezuela..........You can’t blockade Venezuela!

Why not? Land transit through the Amazon is darn near impossible so that takes out Brazil and Guiana. They can't go overland through Columbia since they are darn near at war.

From Wikipedia ... Venezuela is connected to the world primarily via air (Venezuela's airports include the Simón Bolívar International Airport near Caracas and La Chinita International Airport near Maracaibo) and sea (with major sea ports at La Guaira, Maracaibo and Puerto Cabello). In the south and east the Amazon rainforest region has limited cross-border transport; in the west, there is a mountainous border of over 1,375 miles (2,213 km) shared with Colombia. The Orinoco River is navigable by oceangoing vessels up to 400 km inland, and connects the major industrial city of Ciudad Guayana to the Atlantic Ocean.

Venezuela has a limited national railway system, which has no active rail connections to other countries; the government of Hugo Chávez has invested substantially in expanding it. Several major cities have metro systems; the Caracas Metro has been operating since 1983. The Maracaibo Metro and Valencia Metro were opened more recently. Venezuela has a road network of around 100,000 km (placing it around 47th in the world); around a third of roads are paved.

Cut off their access to the sea and are isolated from the world.