Test your knowledge of Nigeria, from its economic heft to its struggle against Boko Haram.

Test your knowledge of the two main international financial institutions.

Take this quiz to test your knowledge of the North Atlantic Treaty Organization, the military alliance underpinning U.S. global leadership.

Test your knowledge of the Cold War, from the Iron Curtain to the Cuban missile crisis.

Test your knowledge of major treaties and peace agreements, including the Peace of Westphalia and the Treaty of Versailles.