Why did Lincoln fire so many of his top generals throughout the war?

Lincoln’s frustration and depression deepened as Union military defeats continued into 1863. The Union army had every advantage in resources, but failed to assemble the military leadership needed to mount a successful campaign.

Lincoln replaced generals and changed the command structure of the army several times before he finally selected Ulysses S. Grant to take command. He had gained Lincoln’s confidence after winning crucial victories at Vicksburg, Mississippi, and elsewhere in the West. In Grant, Lincoln had finally found a general who would muster the full strength of the Union army against the Confederacy.

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