Ulysses Grant was at the end of his military career a lieutenant general and the commander of all Union armies. He had started the US Civil War as a captain of Illinois volunteers and rose quickly through the ranks.
Grant was promoted to Lieutenant General in the spring of 1864. He was the first and only Union officer to wear three stars, and was "the Lieutenant General". It was "the", because he was the only one. Prior to that time the Union armies had no officer of higher rank than two-star Major Generals. This caused problems, because some of the Major Generals who attained that rank early in the war turned out to be incompetent. A goodly number of these were "political generals", politicians who had joined up and through connections and influence got themselves a high position without worrying too much if they had any idea what they were doing. Because these individual were politically powerful it was hard to get rid of them. Lincoln had his hands full trying to keep everyone united behind the war effort. Within the grade of Major General, who outranked whom was decided based on seniority within grade, so those early promotions were a real problem. The other prong of the problem was that the Union did not want to promote anybody past two stars, because George Washington when he commanded the Continental Army had decided to style himself as a Lieutenant General, since he had major generals for subordinates. So, if Washington was a three star, and nobody could be as good as Washington, then nobody got to be a three star. There had been none in the US Army since Washington. Lincoln decided that however laudable this veneration of Washington might be, to make it absolutely crystal clear that Grant was in command, Grant needed three stars, and so Grant got them.
Commander in Chief. He was elected to two terms as the U.S. President from 1869-1877.
Hiram Ulysses Grant, more commonly known as Ulysses S. Grant, held the military rank and title of Brigadier General of the Union army of the North during the United States Civil War.
Ulysses S. Grant was appointed General in Chief in Washington on March 9, 1864, at the presence of the President and the whole Government and promoted to the rank of Lieutenant-General.
German Shepard and the Belgian Malanois have the highest rank in the military.
Grant wore a private's uniform of dark blue, with stars sewn on the shoulders to show his rank.
Field Marshal is the highest military rank in Pakistan Army.
George Washington's highest military rank was commander in chief of the Continental Army.
Given that the highest rank possible in the US Military is Commander-in-Chief, and that the Commander-in-Chief is the President, they all held the highest rank possible. THE ABOVE answer I found here is incorrect. The Commander-in-Chief position is civilian, not military. The whole point of making the president C-in-C is to have civilian control of the military, unlike in other countries in the 18th century whose military did not answer to the government. The president is not a member of the military. I am told George Washington was the only six star general in history (before being president, of course), but I have not checked.
General and commander of northern forces towards the end of the civil war
German Shepard and the Belgian Malanois have the highest rank in the military.
The President is the Commander in Chief. Highest Rank of the Military.
Marshall.