Stalin.
1.268 Million Soviets were killed during the Battle of Stalingrad. This does include civilian Casualties.
45,000 Civilians were killed during the Battle of Stalingrad. All of them were Soviet Civilians in Stalingrad. Most people died either from Starvation, Artillery or Ariel attacks or from Dehydration.
Around 1.9 Million People died during the Battle of Stalingrad 650,000 being Axis Casualties and 1.25 Million being Soviet Troops.
Red Army.
The 250,000 troops died during the battle of Stalingrad were most likely to be referred to the German Sixth Army. During the battle of stalingrad, the German Sixth army went into the city of stalingrad but they were encircled by the Soviet army and trapped. Due to limiations of logistical support and rations, most of the german sixth army died to from starvation or from frost bite.
The best known sniper at the battle of Stalingrad was Vasily Grigorevich Zaytsev, he killed 225 Axis troops during the battle of Stalingrad, and many before and after Stalingrad. He was blinded by a mortar round during the battle of Stalingrad, but was able to have his sight restored. Zaytsev was given the title "Hero of the Soviet Union" and was eventually promoted to the rank of captain. You might also find this list at http://www.wio.ru/galgrnd/sniper/sniper.htm interesting to look at. It does not specify whether these snipers were at the battle of Stalingrad, but I would lay money on a guess that most of them were at some point.
It would most likely be Operation Uranus. This is because it was the major Soviet counteroffensive during the battle of Stalingrad and it lead to the crushing of the German 6th Army, which was one of the reasons why Germany surrendered.
There were a few key events during the Battle of Stalingrad or relating to it. They are;Case BlueOperation UranusOperation Winter StormOperation Little SaturnOperation KoltsoThese were German and soviet offensives and counter offensive attacks. All of this led to the German surrender at Stalingrad and the destruction of the German 6th Army.
In total 1.85 Million People died during the Battle of Stalingrad, 1.250,000 being the Soviet Deaths and 600,000 being Axis Deaths. This does include the death of the German 6th Army (300,000 deaths).
The Battle of Stalingrad was considered one of the deadliest engagements in the entire history of war. There were between 1.7 and 2 million people killed between August 23, 1942 and February 2, 1943.
The surprising move the USSR made during the Battle of Stalingrad was that they launched Operation Uranus on 19th November 1942 and lasted for 4 days until the German 6th Army was totally wiped out. Either they were dead or captured.
The US had nothing to do with the Battle of Stalingrad. Battle of Stalingrad took place on the Eastern Front in the Soviet Union which the US had never been involved with during World War 2. The US was only involved with the War in the Pacific Theater and later on the Western Front.