Not always, Russia lost war in 1920 with Poland. Russia was trying to give military support to communist movements in Europe going across Poland. While Poland was trying to restore lands occupied by Russia in partitions of Polish–Lithuanian Commonwealth in 1772-1795 that lead to Poland not existing for 123 years.
Russia lost that war and had to settle borders with Poland in the Treaty of Riga.
Russia lost that war and had to settle borders with Poland in the Treaty of Riga.