"The situation following the was was of an empire that Rusia had sacrificed from 3,749,000[51] to 4,950,000 people from combat or war related deaths"

No it didn't - you have misread the Wiki Table you copied your figures from - those are the numbers of Russian military WOUNDED. During the First World War in terms of Deaths suffered as a percentage of the population Great Britain fared worse than Russia (Great Britain - 1.91% to 2.23%. Russia - 1.62% to 1.94%).

Russian fatalities during the Second World War which was much bloodier than the First amounted to over 25 million. During his rule 1929 to 1953 Stalin was responsible for the deaths of some 43 million people (Not saying he killed them personally - they died under his orders). Stalin's is named as being the second greatest Democide in the history of the world, second only to that perpetrated by China's Mao Zedong.