Ulysses S. Grant was promoted to the rank of Lieutenant General March 2, 1864 and was appointed General in Chief of the Federal Armies on the 10th of that month.
US President Lincoln was cautious to a critical mass. Knowing all too well that former general McClellan was a political general, Lincoln investigated if Grant had any political aspirations. Grant did not, so that cleared the way for his promotion.
General Grant
He appointed Grant as General-in-Chief in March 1864.
Ulysses S, Grant.
Grant got the job done for Lincoln.
Ulisses S. Grant.
General George Meade ; "Old Snapping Turtle" .
Charles Skelton has written: 'Speech of Mr. Skelton, of New Jersey, against the proposition to appoint a lieutenant general, etc'
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The rank of lieutenant general was established by the Confederate Congress in 1862. Out of respect for George Washington, who held this high rank, the Union waited until February of 1864 to do this. Basically this rank was requested by US President Lincoln for his new general in chief, US Grant.
George Gordon Meade - who won the Battle of Gettysburg just days later.