He was a West Point trained officer, who had quit the service, but rejoined on the outbreak of war.
Stationed in the Western theatre, he was talent-spotted by General Fremont, and then won several of the early Union victories, earning glory for his superior, Henry Halleck, who was soon made General-in-Chief.
U.S. Grant is the one. His name was really Hiram Ulysses Grant, but when he went to West Point. a mistake was made by the man who nominated him, and he became Ulysses S. Grant. He never bothered to have it changed so his name in the army was Ulysses S. Grant.
Ulysses S. Grant
U.S. Congressman, Thomas L. Hamer was pretty much the cause. Hamer erroneously nominated him for the United States Military Academy as Ulysses Simpson Grant, knowing Grant's mother's maiden name and forgetting that Grant was referred to in his youth as "H. Ulysses Grant" or "Lyss". Grant wrote his name in as "Ulysses Hiram Grant" in the West Point registration ledger (concerned that he would otherwise become known by his initials, H.U.G.). West Point's registration adjutant, upon noting the discrepancy between how Grant signed himself in and what was on the official list, advised Grant that he could be registered as Ulysses Hiram Grant, but that the correction had to go to Washington City (D.C.) to be corrected so it could become official. Grant decided, on the spot, to go with the name under which he had been offically nominated by Congressman Hamer, "Ulysses Simpson Grant" but only used the "S" outside of official channels. When asked in the future what "S" stood for he replied it meant nothing in particular. And thus Hiram Ulysses Grant became Ulysses S. Grant.
When President Lincoln had appointed US General Grant as the Union's general in chief, he was given the sacred title of Lieutenant General, used only for George Washington. Grant would not be able to capture Richmond unless he first defeated the Lee led Army of Northern Virginia.
To Sherman, he said "Make Georgia howl!"
General Ulysses S. Grant
This derogatory nickname was apparently used by the Democratic opponents of President Ulysses S. Grant.
The name Grant is from a Scottish surname which was derived from Norman French grand meaning "great, large". It may be used in honor of Civil War general Ulysses S. Grant.
The Grant Administration Scandal: President Ulysses S. Grant used the spoils system to appoint his friends, trusting political leaders-basically people who were on his side after he was elected President.
Although Grant won the war for the Union, mainly because of the fact the Southerners had been used up, unable to maintain a large enough army or sufficient supplies to continue the fight. Grant had an enormous advantage in men and supplies, yet still Lee defeated him on several occasions. As a strategist, most experts agree Lee, had all been equal, would have defeated Grant.
Ulysses S Grant was born "Hiram Ulysses Grant". His family and friends called him by his middle name, usually by the nickname "Lyss". When Grant's father solicited the his Congressman (Thomas Hamer) to nominate Lyss for an appointment to the US Military Academy at West Point, Hamer mistakenly thought his first name was Ulysses and his middle name was his mother's maiden name, Simpson. When Grant arrived at school he discovered the administrators recalcitrant about correcting the name. He thence became Ulysses S Grant, a name he officially adopted upon his graduation. Meanwhile, when other cadets saw his initials "U.S." they nicknamed him "Uncle Sam"quickly shortened to "Sam", the name his friends thereafter used to address him.
This relates to his pre-war posting to a remote desert garrison, where he missed his wife and family, and certainly drank a good deal, before resigning his commission. As to whether he jumped or was pushed, the record is unclear. For that reason, one might guess that he was pushed, and then later used his high status to conceal the unflattering truth.