Step 1: Understanding the Concept:
The question asks to identify the country or region led by the revolutionary leader Ho Chi Minh.
Step 2: Detailed Explanation:
Ho Chi Minh was a Vietnamese communist revolutionary leader. He was the key figure in the foundation of the Democratic Republic of Vietnam, more commonly known as North Vietnam, in 1945. He served as its Prime Minister and later as its President. He led the Viet Minh independence movement against the French and later the Viet Cong during the Vietnam War against South Vietnam and the United States, with the ultimate goal of unifying Vietnam under communist rule.
Step 3: Final Answer:
Ho Chi Minh was the ruler of North Vietnam.