Union General US Grant was basically placed in charge of the Western Theater of the US Civil War. He, as did Lincoln, lost all faith in General Rosencrans. He therefore replaced Rosencrans with General George H. Thomas.
When General Rosencrans left Virginia to take control of the Army of the Mississippi, this placed him under control of Major General US Grant. At first Rosencrans was a success. He fought his first battle as the commander of the Mississippi at Iuka, Mississippi. Although he won the battle, he did not pursue the retreating Confederates as Grant had ordered. This problems increased after the Battle of Corinth. Rosencrans was the victor, however, once again, Rosencrans failed to pursue the retreating Confederates. This worsened the relationship between the two generals.
Both US President Lincoln and General in Chief Henry Wager Halleck ordered and expected General Rosencrans to advance against the army of Braxton Bragg. Rosencrans explained to Washington DC that by holding his ground, he prevented more Southern troops to aid Vicksburg. He may have been correct.
After the Union disaster at the Battle of Chickamauga, the US Department of War gave US Grant the authority to retake Chattanooga from the Confederates. Crucial there was the replacement of General Rosencrans with General Thomas as commander of the Army of the Cumberland. US Grant had a hand in this change change and thereby increased his confidence in a Union victory.
When Major General Franz Siegel had been defeated by Confederate General Breckininridge and Colonel Mosby in the Shenandoah Valley, Grant had no choice but to replace him. On May 19, 1864, Grant appointed Major General David Hunter to head the Army of the Shenandoah. Hunter was a Virginian, who had been a solid Unionist. It appeared that Grant had found the right general to insure the Union's integrity in the vital Shenandoah Valley.
General Grant General Grant General Grant
Major General William S. Rosencrans Major General Ulysses S. Grant
When General Rosencrans left Virginia to take control of the Army of the Mississippi, this placed him under control of Major General US Grant. At first Rosencrans was a success. He fought his first battle as the commander of the Mississippi at Iuka, Mississippi. Although he won the battle, he did not pursue the retreating Confederates as Grant had ordered. This problems increased after the Battle of Corinth. Rosencrans was the victor, however, once again, Rosencrans failed to pursue the retreating Confederates. This worsened the relationship between the two generals.
Both US President Lincoln and General in Chief Henry Wager Halleck ordered and expected General Rosencrans to advance against the army of Braxton Bragg. Rosencrans explained to Washington DC that by holding his ground, he prevented more Southern troops to aid Vicksburg. He may have been correct.
When the US Civil War began Rosencrans volunteered to be an aid to General George B. McClellan. In summary form here are the events that brought Rosencrans to become a key to Union military operations in Tennessee:1. He became a brigadier general and participated in General McClellan's operations in western Virginia;2. When McClellan left to take command of the Army of the Potomac, Rosencrans served as commander of the departments of Ohio and Western Virginia;3. Rosencrans left Virginia to command a division in the Army of the Mississippi;4. He was promoted to be the commander of the Army of the Mississippi;5. This placed him under the direct command of US Grant;6. Rosencrans fought his first major battle at Iuka Mississippi and won the battle;7. US Grant was disturbed at Rosencrans because he failed to follow Grant's orders to pursue the enemy;8. At this juncture, ill feelings between the generals began;9. At the Battle of Corinth in 1862, Rosencrans again was the victor, however, he failed to pursue the enemy; and10. Rosencrans was reassigned to the Army of the Cumberland, and thus fought Confederate General Braxton Bragg in Tennessee.
After the unexpected defeat of the Union's Army of the Cumberland, the US Department of War wanted a change in leadership. General George Thomas replaced Rosencrans as the commanding officer of that army. It appears that General US Grant may have made that recommendation. With all certainty, the Assistant Secretary of War, pushed for his removal.
After Union General William Rosencrans was defeated at the US Civil War Battle of Chickamauga, President Lincoln had lost all confidence in General Rosencrans. As a result of this Lincoln combined the departments of generals Burnside and Rosencrans with US Grants. The new military department of the Mississippi was now under the command of US Grant.
The very mistake Rosencrans did was not that of fleeing from the battlefield, but that of not turn back and resume the command, once, about at 1pm, the Unionists had been able to balance the situation. Therefore the removal was, in my opinion, justified.
After the Union disaster at the Battle of Chickamauga, the US Department of War gave US Grant the authority to retake Chattanooga from the Confederates. Crucial there was the replacement of General Rosencrans with General Thomas as commander of the Army of the Cumberland. US Grant had a hand in this change change and thereby increased his confidence in a Union victory.
When Major General Franz Siegel had been defeated by Confederate General Breckininridge and Colonel Mosby in the Shenandoah Valley, Grant had no choice but to replace him. On May 19, 1864, Grant appointed Major General David Hunter to head the Army of the Shenandoah. Hunter was a Virginian, who had been a solid Unionist. It appeared that Grant had found the right general to insure the Union's integrity in the vital Shenandoah Valley.
General Grant General Grant General Grant
In late October of 1862, Major General William Rosencrans took over the Army of the Cumberland from General Don Carlos Buell. Hallecks instructions to Rosencrans were the following:* Apply pressure on the Confederate Army of Tennessee and force it out of Kentucky; * Cover Nashville and repair the railroad to permit the movement of supples between Nashville and Louisville, Kentucky; and * Maintain pressure on the Army of Tennessee to prevent it from moving West to hinder the operations of General US Grant.
There were few, if any, major military actions in 1863 that did not have the approval of US President Lincoln or his Secretary of War, Edwin Stanton. With that said, the answer was yes regarding pressure from Washington DC placed on General Rosencrans. On July 7, 1863, he received a strongly worded message from Secretary Stanton to advance onward to Chattanooga, Tennessee. Rosencrans was informed that he needed to do his part to seal the fate of the Confederacy. Rosencrans was informed that Lee's army in Pennsylvania was in retreat and that Grant had things well under control regarding Vicksburg. Stanton "ordered" Rosencrans to march on Chattanooga.