Homeland Security officials have removed Adm. Linda Fagan from her role as the Coast Guard’s commandant, according to a note sent to service members — the first firing of a top military officer under the Trump administration.

Trump’s removal of Adm. Linda Fagan, who made history as the first woman to lead a U.S. military service, is the first of several potential leadership changes.

The Trump administration ousted Coast Guard Commandant Linda Fagan, who is the first woman to lead a branch of the U.S. military.