"Kursk crushed the German offensive in the Soviet Union once and for all.
Hitler's war machine may have been shaken by its tremendous loss of men and material at Stalingrad, but it was far from finished. Six months after losing more than two-hundred-thousand men at Stalingrad, Germany assembled sufficient forces to attempt to encircle and break the Red army at Kursk in Southern Russia. Stalin had just seen his soldiers defeated at Kharkov and was wary enough not to risk a summer offensive in 1943. He was waiting for the western allies to open their second front in the Mediterranean and would play a defensive strategy instead.
A Soviet spy ring called 'Lucy' gave Stalin full warning of Germany's intentions for an offensive at Kursk, code-named Zitadelle. ...over the course of three months more than half a million railway wagonloads of supplies were brought in. (The long delay because Hitler was waiting for 'supertanks': Panther and Tiger)
At Kursk, the Russians built three main fortified lines, which were protected by anti-tank ditches, minefields, concealed anti-tank gun emplacements, dug-in T34 tanks, tank traps, flame-throwers and artillery batteries. The idea was to channel the attacking armor into a web of flanking fire.. Some 6,000 km(3,750miles) of trenches were dug, with more than 48,000 mortar and artillery positions. An average of 1,500 mines were laid per kilometre. An array of T34 tanks were held in reserve between the fortified lines to effect counterattacks.
The battle began with a total of 6,000 tanks and 4,000 aircraft engaged on both sides." excerpt from :Turning The Tide of War by Tim Newark.
Guess what...The Russians won!....as usual, the losses were far heavier for them, but that was standard fare.