In March 2003, U.S. forces invaded Iraq vowing to destroy Iraqi weapons of mass destruction (WMD) and end the dictatorial rule of Saddam Hussein. When WMD intelligence proved illusory and a violent insurgency arose, the war lost public support. Saddam was captured, tried, and hanged and democratic elections were held. In the years since, there have been over 4,700 U.S. and allied troop deaths, and more than one hundred thousand Iraqi civilians have been killed. Meanwhile, questions linger over Iraq's fractious political situation.

The Taliban surged back to power two decades after U.S.-led forces toppled their regime in what led to the United States’ longest war.

Over the two centuries since Colombia’s independence, the relationship between Washington and Bogota has evolved into a close economic and security partnership. But it has at times been strained by U…

The United States' dependence on oil has long influenced its foreign policy. This timeline traces the story of U.S. oil development.

The nuclear arms race was perhaps the most alarming feature of the Cold War competition between the United States and Soviet Union. Over the decades, the two sides signed various arms control agreeme…