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Timeline: A century of changes in who can serve in the U.S. military

Lazaro Gamio / Axios

President Trump announced via Twitter on Wednesday morning that transgender people would no longer be allowed to serve in the U.S. military. That announcement came 69 years to the day after Harry Truman issued an order abolishing racial discrimination, and leading to the end of segregation, in the armed forces.

Here's how determinations of who is and isn't fit to serve have shifted over the past century: