Depends on the battle
At the Battle of Cowpens, January 17, 1781. Hannah's Cowpens was an area in northwestern South Carolina. Morgan had a small group of Continental soldiers, and his force was mostly local militia. They killed or captured almost all of the British force. The British commander, Tarleton, and about thirty mounted men escaped.
On the Union side were killed 2,108 soldiers. On the Confederate side were killed 2,700 soldiers.
2,246 union soldiers were killed in the battle of wilderness
There was over 2,000 British soldiers killed in the Battle of New York in July 1776.
all of them
39,000: 19,000 American soldiers and 20,000 German soldiers were killed at the Battle of The Bulge.
There were 753 reported Union soldiers killed during the Battle of Chattanooga.