I have read the War of the Rats, by David Robbins. It's about the battle for Stalingrad and the famous Russian sniper, Vasiliy Zaitsev. It gives some history insight and aproximate losses, so here they are:
Original name: Tsaritsyn
During Communism: Stalingrad
Now named: Volgograd
Began: August 23rd, 1942
Ended: January 31st, 1943
German commander: General Friedrich Paulus
Russian commander: General Vasiliy Chuikov
German 6th army kept its strength inside the city always at 100,000, drawing manpower from Italian, Hungarian and Rumanian divisions positioned on the steppe outside the city. Russians never exceeded 60,000, sometimes as low as 20,000, when fighting desperately and barely surviving until reinforcements could be ferried across the Volga river. The fighting was SO intense, for every centimeter of the city that it was named Rattenkrieg, or "war of the rats" (which is where the book drew its name). Both armies fought with incredible will and determination, the whole city was reduced to smoking ruins, a charred reminder of what the city used to look like. For months the fighting was street to street, house to house, hand to hand, sometimes the reward for hundreds of lives were mere couple meters, only to be lost the next day. The city exchanged hands many times in fact. To illustrate the Russian determination to hold the city NO MATTER WHAT, there's a landmark in the city of Stalingrad which can be seen even today, as it was preserved as a symbol of the Russian Will. It's called Pavlov's House. It was named after a sargeant in the Russian Army, Yacov Pavlov, who with a company of men took a 4 story house, and defended it for FIFTY NINE days against the relentless German attack. He actually survived the battle and WW2 and was awarded the Hero of the Soviet Union medal (CMoH equivalent). Chuikov liked to point out that Pavlov and his men killed more enemy soldiers than the Germans lost in the capture of Paris. By mid-October the city almost fell into German hands, Russians had their backs to the river, but by November, the Red Army executed its "November surprise", springing suddenly with incredibly speed and flanking the Axis powers from both north and south, completely encircling them, so they were between the anvil and the hammer, or as the Germans called it, der Kessel, "The Cauldron". Of the more than 250,000 troops sorrounded on the steppe, only about 100,000 remained to surrender to the Red Army two and a half months later.
Axis casualties:
German - 400,000
Italians - 130,000
Hungarians - 120,000
Rumanians - 200,000
Red Army:
750,000 killed, wounded and missing
Final toll on soldiers of both armies:
1,109,000 deaths.
Civilian losses:
Out of Stalingrad's 500,000 pre-war population, only 1.500 civilians were alive after the battle's end!
Kinda makes you glad that you weren't born yet to see that horror, huh?