@alexture Without the military support UK and USA gave to Russia, it would take more time for sure. Still, yes Russia own the war on the east and its intervention in the last days of the Pacific campaign was the true motive, not the atomic bombs, that ended Japan resistance. We must not forget that Japan feared Russia all over the rest; as they where already being beaten on the 1939 invasion they tried. https://www.youtube.com/watch?v=GGwUlET2tbw&t=15s
Battle of Khalkhin Gol 1939 – Soviet-Japanese War DOCUMENTARY