An executive order rebranding the Defense Department as "War Department" was due to be signed by President Donald Trump on Friday as he marked his 200th day in office.

The Trump administration moved Friday to change the name of the Department of Defense back to the Department of War, the title it went by for 158 years from its creation by George Washington in 1789 during his first term through the late 1940s. File Photo by Yuri Gripas/UPI UPI

Sept. 5 (UPI) -- President Donald Trump will sign an executive order on Friday directing the Department of Defense to revert to its old title of Department of War and for Defense Secretary Pete Hegseth's title to be changed to Secretary of War.

The order makes clear the name change was aimed at emphasizing the armed services' dynamic offensive capabilities with the aim of "projecting power and resolve," as well as their role in defending the United States and its interests.

"The name 'Department of War' conveys a stronger message of readiness and resolve compared to 'Department of Defense,' which emphasizes only defensive capabilities," the text of the order states.

It adds that the change would "sharpen the focus of this Department on our national interest and signal to adversaries America's readiness to wage war to secure its interests."

"The United States military is the strongest and most lethal fighting force in the world, and the president believes this department should have a name that reflects its unmatched power and readiness to protect national interests," the White House added in a fact sheet.

However, the Pentagon, which replaced the George Washington-era War Department in 1947, will only be able to use the new title as a secondary name for now because formally creating new cabinet-level departments is a power reserved to Congress -- although the administration can make the switch for official communications.

The order does direct Hegseth to bring forward legislative and executive actions to formalize the renaming in law, however, Trump has expressed confidence that the process wouldn't prove an obstacle.

"We're just going to do it. I'm sure Congress will go along, if we need that. I don't think we even need that," he said.

Anticipation that a name change could be imminent has been stoked by Trump, who has sought to link the name used to the United States' record in the theater of war, noting that the country prevailed in two world wars under the "War Department."

"Everybody likes that we had an unbelievable history of victory when it was the Department of War. Then we changed it to Department of Defense," Trump told reporters in the Oval Office last week.

A post from Hegseth on X late Thursday simply read: "DEPARTMENT OF WAR."

However, the administration has been mute on the potential costs associated with the rebrand, when and if it is made permanent, amid reports that implementing the changes to emblems, email addresses, uniforms, at U.S. bases and around the world and across hundreds of related agencies could run to $1 billion.

The department was called the War Department from 1789 to 1947, when Congress enacted legislation merging it with the navy and air force to become the National Military Establishment.

Congress created the civilian-led Department of Defense two years later via an amendment to the National Security Act.