The Battle of Kursk was the largest armored battle of all time. Here are the numbers and a link to the story. Casualties were extremely high, the horror must have been un-imaginable.
Germans:
900,000 men
2500 aircraft
10,000 artillery
2400 tanks
Russians:
1,350,000 men
2650 aircraft
20,000 artillery
4000 tanks
http://www.fortunecity.com/victorian/riley/787/Soviet/Zhukov/Kursk.html