George Washington was appointed "General of the Armies of the United States" by Congress in 1976, with the intent to permanently and irrevocably place him at the head of all U.S. Generals, including Pershing in WW1, and the 5-star Generals and Admirals of WW 2.
No doubt on this. Despite promotions to "super star" levels, US history owes a debt to George Washington that no one can exceed.
He was the highest ranking officer captured..Yes
The General of The Army, but it is reserved for Wartimes. General is the normal highest.
There were a number of American Generals of WWI, like General Douglas MacArthur and General John F. O'Ryan. But the highest ranking American General of WWI was General of the Armies John Joseph Pershing, Commander of the American Expeditionary Force (AEF).
Not necessarily.
William T. Sherman
The US Attorney General is the highest ranking officer of the US Department of Justice, aside from the President of the US.
BARACK HUSSEIN OBAMA
General Ulysses S. Grant held the rank of General in the United States Army during the American Civil War. He was appointed as the Commanding General of the U.S. Army in 1864 and played a crucial role in leading Union forces to victory. After the war, he was promoted to General of the Army, a rank that was created specifically for him, making him one of the highest-ranking officers in U.S. military history.
General John J. "Black Jack" Pershing was the highest ranking general in the US armed forces. His rank was General of the Armies, and no other US general before or since has held this rank. Pershing was authorized to design his own insignia, but instead he kept his four-star general insignia.
General Simon Bolivar Buckner
General (4 stars)
General (4 stars)