“Land, horses, cattle”
Cite the orders where Lincoln exempted Southern land, horses and cattle from being destroyed, seized or eaten.
The war would have take a couple of weeks if the Confederate Government was party to the agreement. If not it would take considerably longer.
The Confederates decided they did not want to be Citizens of the United States. Therefore The article cited is irrelevant. It applies only to U.S. Citizens.
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.
The official position of the Union is that they do not get to decide. The Union decided that they remained citizens of the United states, and so therefore the Union should have been forced to treat them like citizens of the United States.
If the Union acknowledged they were in fact citizens of another Nation, then what they did to them can be excused, because Constitutional law does not apply to the citizens of other nations on foreign soil.
But that is not the claim the Union made.