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The US stops providing arms to the Batista regime. This severely weakened Batista's position. The Cuban air force also rapidly lost power as it had no spare parts
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Operation Verano - 10 000 troops and tanks sent to the east. Castro defeats them due to guerrilla warfare tactics and superior intelligence
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11 - 21 July. Humiliating loss for Batista. The leader of the forces was Castro's former classmate, and he surrendered and gave his weapons to Casto's army