Date	Union forces	Confederate forces	Union casualties	Confederate casualties	Winner
#1 Battle of Gettysburg	July 1-3, 1863	82,289	75,000	23,049	28,063	Union
#2 Battle of Chickamauga	September 19-20, 1863	58,222	66,326	16,170	18,454	Confederate
#3 Battle of Chancellorsville	May 1-4, 1863	133,868	60,892	17,278	12,821	Confederate
#4 Battle of Spotsylvania	May 8-19, 1864	83,000	50,000	18,399	9,000	Confederate
#5 Battle of Antietam	September 17, 1862	75,316	51,844	12,410	13,724	Union
#6 Battle of The Wilderness	May 5-7, 1864	101,895	61,025	17,666	7,750	Undecided
#7 Battle of Second Manassas	August 29-30, 1862	75,696	48,527	16,054	9,197	Confederate
#8 Battle of Stone's River	December 31, 1862	41,400	37,739	12,906	11,739	Union
#9 Battle of Shiloh	April 6-7, 1862	62,682	40,335	13,047	10,694	Union
#10 Battle of Fort Donelson	February 13-16, 1862	27,000	21,000	2,832	16,623	Union