General Grant was carrying on the Siege of Petersburg and at the same time his efforts to reach and interrupt the vital railway net which supplied the Confederate front of Richmond - Petersburg.
On July, 30th 1864 the Union offensive called "Battle of the Crater", aiming to break through Petersburg's front failed. The stalemate continued.
General Sherman was carrying on his efforts to conquest Atlanta but the progress was slow and not decisive so that it seemed that even on this front it had reached a stalemate.
They ended the war in the only way he thought possible - pure attrition. He had ended the system of prisoner-exchange, and simply waited for the Confederates to run out of manpower. It was Sherman who saw a solution that was less costly in casualties - destroying the farms and railroads that supported the Confederates in the field.
Lee was stuck in Petersburg, near Richmond, under siege by U.S.Grant. He had been kept on the defensive, and so was not free to conduct any of his famous bold thrusts. However he was costing Grant more casualties than Grant was costing him, although Lee was still the one running out of manpower, since Grant had ended the system of prisoner exchange.
Based on the instructions from General in Chief Henry Wager Halleck, US Grant sent General Sherman to catch Confederate General Johnston's army. Sherman was unable to snare the elusive Johnston, but was able to destroy the railroad bridge as directed by Grant. Sherman was then directed to return his force back to the base on the Mississippi River. Sherman decided to extend his expedition a few extra days on his own initiative. He ordered his regiments to march along the tracks and seize the railway ties. The ties were positioned in such a way that when set on fire they formed a line and became the early versions of his famous Sherman "neckties". He then allowed his men to loot homes and burn them, leaving only blackened chimneys, called later on as "Sherman Monuments".As an aside, when the war ended he spent his unused anger on helpless Native Tribes.
Effectively the Siege of Vicksburg, which surrendered on July 4th 1863. This liberated the Mississippi and enabled Grant and Sherman to evacuate the Western region. It did not quite end hostilities, as there were still forces in Louisiana (Red River campaign), but these were insignificant, and when Grant became General-in-Chief, he sent no fresh troops to the West.
Attrition. After he ended the system of prisoner-exchange, the Confederates were bound to run out of manpower before the Union did.
Lincoln's overall strategy was simply to beat the Confederates. Most of the important decisions by his Generals were to do with talent-spotting new Generals - Fremont selecting Grant, Grant selecting Sherman and Sheridan. Among the tactical and strategic decisions: Grant crossing the Mississippi downstream of Vicksburg, totally confusing the garrison commander. This ended the war in the West. Grant ending prisoner-exchanges when he became General-in-Chief. This tilted the manpower numbers against the Confederates. Sherman turning East and crossing Georgia and the Carolinas, almost unopposed. This devastated Confederate morale, and helped to shorten the war.
General William T. Sherman and General Joseph E. Johnston!
Abraham Lincoln I believe. However, the first generals he appointed all were fired or didn't want the position. In fact, he actually asked General Lee if he would take the position. Lee ended up going with the South. McClellan was hired then fired the hired then fired by Lincoln. There are a few more in between there. Then Sherman was hired, and so was Grant.
New Jersey Generals ended in 1985.
It ended in Savannah on December 22, 1864.
That was Grant mounting a major assault against Lee - a costly failure, and the biggest mistake of Grant's career, as he admitted in his memoirs. After that, he settled in for the nine-month Siege of Petersburg - also costly, but not a failure. It brought Lee's surrender, and ended the Civil War.
In battlefield terms, Grant and Sherman - greatly helped by Abraham Lincoln, who had learned to choose and use good Generals in the second half of the war. Victory was achieved by Grant ending the system of prisoner-exchange, and basically waiting for the Confederates to run out of manpower, making sure that Lee was pinned-down and unable to carry out any of his famous bold thrusts. Meanwhile Sherman attacked the infrastructure of the Confederacy, burning farms and wrecking railroads, to bring the Southern economy to its knees and help to starve the Confederate troops in the field. This shortened the war by months, at almost nil casualties.
Grant was a professional soldier and commander of all union armies when the war ended, B. Harrison and Garfield were brigadier generals and Hayes was brigadier general of volunteers.
It didn't split the Confederacy in two. It was a punitive raid of destruction that simply helped to destroy the Southern economy and starve the Confederate armies in the field. Splitting the Confederacy in two is what Grant (and Sherman) achieved earlier in the Siege of Vicksburg, which ended with the liberation of the Mississippi.
Sherman's March to the Sea began on November 15 and ended on December 21, 1864. Sherman was a Major general in the Union Army.
They were losing too many men in war. How, because Grant ended the prisoner exchange and Sherman destroyed the the farms that contained the armies in the field. Also due to the fact the south had such a small population.
It ended the war in the West, denying the Confederates all use of the Mississippi, and enabling Grant and Sherman to head East and help the Army of the Cumberland. It also took 30,000 paroled Confederate prisoners out of the war.