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In honor of the US Navy's birthday on October 13th - Looking back at 100 years of military history

Stacker Logo By Michele Zipkin of Stacker | Slide 1 of 102: The United States’ armed forces have played major roles in two world wars and ongoing civil conflicts over the past century—the “War on Terror,” for example. Whether ultimately futile or integral, U.S. military involvement in major wars has impacted the government’s ability to make educated decisions that benefit both domestic and foreign affairs.The military itself has undergone a few structural changes, adding new divisions, and permitting women and LGBTQ people to serve in all military branches. Just how many people does that encompass? Drawing on information from the Defense Manpower Data Center, Stacker has gathered the number of Americans in each military branch from 1917 until 2017, as well as the percentage of Americans enlisted each year using data from the U.S. Census historical population tables and the St. Louis Federal Reserve.RELATED: 82 top-rated charities for supporting the military, veterans, and their families

Looking back at 100 years of military history

The United States’ armed forces have played major roles in two world wars and ongoing civil conflicts over the past century—the “War on Terror,” for example. Whether ultimately futile or integral, U.S. military involvement in major wars has impacted the government’s ability to make educated decisions that benefit both domestic and foreign affairs.

The military itself has undergone a few structural changes, adding new divisions, and permitting women and LGBTQ people to serve in all military branches. Just how many people does that encompass? Drawing on information from the Defense Manpower Data Center, Stacker has gathered the number of Americans in each military branch from 1917 until 2017, as well as the percentage of Americans enlisted each year using data from the U.S. Census historical population tables and the St. Louis Federal Reserve.

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