The Executive Order "Enabling All Qualified Americans To Serve Their Country in Uniform" was issued to allow transgender individuals to serve openly in the U.S. military without facing discrimination. It overturns policies from the previous administration that restricted transgender service in the military. The order directs the Department of Defense and the Department of Homeland Security to review and adjust their policies to support this change, including preventing discharge or denial of reenlistment based on gender identity. These departments must report progress on implementing this order within 60 days.
Simple Explanation
The President signed a rule so that people who are transgender can join the military and serve their country just like anyone else, and the military has to fix any rules that aren't fair to them.