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

The commandant of the US Coast Guard has been removed from her position over “leadership deficiencies” and “operational failures,” a Department of Homeland Security official confirmed to CNN on Tuesday.

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.