Except, while it's cold, down by the Wall, it's not thick snows yet. It's hardly fall, much less winter. Mance surrendered and many of his men were lost in the initial attack by Stannis, but the vast majority of his horde fled. They just picked up and ran. They weren't conquered as much as their vanguard was broken and their main and rear were scattered. Stannis only attacked and broke the tip of the spear.
6/17/14 at 3:43pm