A medium firm mattress is ideal for this type of sleeper. For side sleepers, a mattress with slight softness is necessary to cushion the shoulders and hips. Stomach sleepers (who very likely sleep this way because of lower back pain) need a firmer mattress to keep them afloat.
Nowhere is the Volga River more hallowed than in the city named after it: Volgograd, better known to history as Stalingrad. During World War II, perhaps the bloodiest battle in history took place there. A total of 2 million people were lost on both sides in the fighting from the summer of 1942 to February 1943.
The Volga River's watershed (area of land drained by the river) is 532,821 square miles in size, and includes most of Western Russia. The Volga River's major tributaries are Kama River and Oka River. There are approximately 200 other tributaries that join the Volga River along its route. Major cities that the Volga River passes through include Astrakhan, Volgograd, Saratov, Samara, Ulyanovsk, Kazan, Nizhny Novgorod, Yaroslavi, and Tver.