Gettysburg-American Civil War (east)
Normandy- WWII (eastern front), Stalingrad (western front)
Vicksburg- American Civil war (west)
The Battle of Saratoga 1777- American Rev. war
The Battle of Quebec- French and Indian War
Antitem-U.S. Civil War (east): at Gettysburg, the C.S. were defeated, but not beaten. They could have won had England and France recognized the C.S. and forced recognition on the U.S.A. ending the war in favor of the C.S.A.
Chatanooga-U.S. civil war (west)-had the U.S. been halted infront of Chatanooga, they would have had a hard time going forward. Had they been halted, they could have added Kenteucky, and Tennesse the the Union, but may not have been able to invade Georgia.
Op. Barbarossa WW2 (east)-had the Germans taken stalingrad, the bood they payed might have been worth it as the Russians had suffered just as badly untill the German army inside Stalingrad was cut off, and starved of supplies and reinforcments.
Pearl Harbor WW2 (Pacific)-with the U.S. entry into the war, the tide was turned. Japan could have kicked the U.S. of the Hawaiian Islands if they'd screwed up bad enough, but they couldn't have beaten the U.S. And U.S. forces fought in Africa, and the Western front. Lets face it, the U.S. and England out weighed Japan, AND Germany together. There is almost no way the U.S. could have lost the war unless Germany had continued, and beaten the U.S. to the A-bomb, or if Japan had had built another nuke, and had long range bombers.
Gotta agree about Saratoga.
And Plains of Abraham- Had Montclam beaten the British, the war might have been ended soon after, the british having failed to out flank the French line of forts.