Army Secretary Dan Driscoll has submitted his resignation to President Trump and will leave his post at the Pentagon in the coming days.

Driscoll’s resignation comes after months of tension between him and War Secretary Pete Hegseth. The Post previously reported that Hegseth feared being fired by Trump and replaced by Driscoll.

“Secretary Driscoll has been highly effective in advancing President Trump’s agenda to Make America Strong Again at the Department of the Army by providing outstanding leadership during historic military operations, restoring an emphasis on readiness and lethality, assisting with negotiations between Russia and Ukraine, and more,”  White House spokeswoman Anna Kelly said in a statement.

“The United States Army is more powerful than ever thanks to his work alongside the Commander-in-Chief and Secretary of War,” she added.

Driscoll’s last day at the Pentagon will be as early as Sept. 4, according to a source.

The Wall Street Journal first reported Driscoll’s resignation.