He called for additional troops and put general George B. McClellan in command
He called for additional troops.
To appoint George McClellan as commander of the Army of the Potomac.
The First Battle of Bull Run
If you are referring to withdraw from the Union, the term is "secede".
Union forces won the Battle of Shiloh thanks to reinforcements from Grant and Buell's army. Their arrival turned the battle and forced the Confederates to retreat.
He called for additional troops.
He called for additional troops.
He called for additional troops.
He called for additional troops.
He called for additional troops.
Lincoln called McClellan to Washington to fortify the city and train the army.
He called for additional troops.
To appoint George McClellan as commander of the Army of the Potomac.
The First Battle of Bull Run
The First Battle of Bull Run.
Gettysburg
It was the first battle in which Lincoln exclusively planned the Union's tactics.