[Bars4Bill]

One soldier receives a new pair of socks, which would no doubt be one of the most wonderful things a soldier of the time could receive.

The officer on his left looks a lot like Burnside, of Fredericksburg "fame" and sacked by Lincoln three weeks after this Harper's.

[Sam Hill]

Could be, I guess. He's sure got the side-burns for it. (As do a couple others.)