Well, I almost forgot a very important battle that, perhaps is the most bloodier in the western hemisphere:
August 2, 216 BC
Mr. Annibal textbook victory
70,000 killed (Polybius),
50,000 killed (Livy),
around 11,000 captured
Total fatalities in ONE DAY:
In comparison the first day in the Somme looks like a pic nic: the British suffered 19,240 dead, 35,493 wounded, 2,152 missing and 585 prisoners for a total loss of 57,470.
That makes Antietan look small. I wonder why CNN is crying so loud about 3,000 Us casualties in Iraq in 4 years of conflict? OK, a human life is human life, but... look at the numbers. The Romans didn´t pull out their troops nor sued for peace after Cannae: they got pissed and went to Cartage to burn, kick and bite.