javaguru said:
I'm talking the Somme, one battle where artillery and machine guns caused 58k casualties in a day.....verified casualties.
Battle Conflict Casualties Year
Battle of Yarmouk Muslim conquest of Syria, Byzantine-Arab Wars 0,120,000 120,000 casualties[1][2] #0636
Battle of Las Navas de Tolosa Reconquista 0,102,000 ~102,000 casualties #01212
Battle of Salsu Goguryeo-Sui Wars 0,097,000 97,000 casualties[3] #0612
Battle of Cannae Second Punic War 0,092,000 92,000+ casualties[4] !9783 216 BC
Battle of Arausio Cimbrian War 0,080,000 80,000 casualties[5][6][7] !9894 105 BC
Battle of Plataea Greco-Persian Wars 0,077,000 77,000 casualties[8][9] !9520 479 BC
Third Battle of Panipat Imperial Maratha Conquests 0,075,000 75,000+ killed #1761
Battle of Wagram Napoleonic Wars 0,074,000 74,000 casualties #1809
Battle of Ullais Muslim conquest of Persia 0,071,000 71,000+ killed[10] #0633
Battle of Valea Albă Ottoman wars: European campaigns, Moldavian-Ottoman Wars 0,070,000 70,000+ casualties #1476
Battle of Guandu Three Kingdoms 0,070,000 70,000+ casualties #0200
Battle of Pliska Byzantine-Bulgarian Wars 0,070,000 70,000+ casualties #0811
Battle of Watling Street Boudica's Uprising 0,070,000 70,000+ casualties #0061
Battle of Siffin First Islamic civil war 0,070,000 70,000 casualties #0657
Battle of Anchialus Byzantine-Bulgarian Wars 0,070,000 70,000 casualties #0917
Battle of az-Zallaqah Reconquista 0,070,000 ~70,000 casualties #1086
Battle of Heunghwajin Third Goryeo-Khitan War 0,060,000 60,000–70,000 casualties #1018
Sorry...not even Top 15
Saying these numbers may be inflated is strictly hypothetical. Its the best we have.