[DiogenesLamp]

Cite the orders where Lincoln exempted Southern land, horses and cattle from being destroyed, seized or eaten.

I don't need to cite any such order. The fact that such still existed in the South after the war demonstrates they were not treated in the same manner as were the slaves.

Had they treated other assets as they did the slaves, there would be no land, cattle or horses left in the South.

That's why it is clear this was not about the "war effort" but was instead merely the will of the people running the war.

[Bull Snipe]

Actually slaves still existed in the States of the defeated Confederacy at wars end. So Lincoln did not treat them any differently than the horses, mules, or houses that his army missed.