How many wars have been fought since 1900 and involve the US?

The United States has been involved in numerous conflicts since 1900. According to various estimates, the number of wars or military interventions involving the US during this time period can range from several dozen to over a hundred, depending on how conflicts are defined and classified.

Some notable wars and military engagements involving the US since 1900 include:

- Spanish-American War (1898)

- Philippine-American War (1899-1902)

- Boxer Rebellion (1900)

- World War I (1914-1918)

- Russian Civil War (1918-1920)

- World War II (1939-1945)

- Korean War (1950-1953)

- Vietnam War (1954-1975)

- Persian Gulf War (1990-1991)

- War in Afghanistan (2001-2021)

- Iraq War (2003-2011)

In addition to these major wars, the US has also been involved in numerous other military operations, interventions, and conflicts around the world, such as the Dominican Republic Civil War, the Lebanese Civil War, the Grenada invasion, the Panama invasion, and the Libyan Civil War, to name a few.

The exact number of wars and conflicts involving the US since 1900 is a subject of debate, as different sources may use different criteria and definitions to classify conflicts. It is also worth noting that not all conflicts involve military engagements or casualties, as some may be diplomatic or economic in nature.