This report is written in response to numerous requests for war casualty statistics and lists of war dead. It provides tables, compiled by sources at the Department of Defense (DOD), indicating the number of casualties among American military personnel serving in principal wars and combat actions. Wars covered include the Revolutionary War, the War of 1812, the Mexican War, the Civil War, the Spanish-American War, World War I, World War II, the Korean War, the Vietnam Conflict, and the Persian Gulf War. Military operations covered include the Iranian Hostage Rescue Mission, Lebanon Peacekeeping, Urgent Fury in Grenada, Just Cause in Panama, Desert Shield and Desert Storm, Restore Hope in Somalia, Uphold Democracy in Haiti, and the ongoing Operation Enduring Freedom (OEF) and Operation Iraqi Freedom (OIF). For the more recent conflicts, starting with the Korean War, more detailed information on types of casualties, and, when available, demographics have been included. This report also cites sources of published lists of military personnel killed in principal wars and combat actions. This report will be updated as events warrant.