Battle of Warsaw (1920)
The battle of Warsaw was fought from August 12–25, 1920 as Red Army forces commanded by Mikhail Tukhachevsky approached the Polish capital of Warsaw and the nearby Modlin Fortress. On August 16, Polish forces commanded by Józef Piłsudski counterattacked from the south, disrupting the enemy's offensive, forcing the Russian forces into a disorganized withdrawal eastward and behind the Neman River. Estimated Russian losses were 10,000 killed, 500 missing, 30,000 wounded, and 66,000 taken prisoner, compared with Polish losses of some 4,500 killed, 10,000 missing, and 22,000 wounded.
Franciszek Sikorski
In November 1918, Sikorski joined the newly created Polish Army, serving as commandant of the 13th Rifle Regiment of the 4th Division of Polish Rifles (General Lucjan Zeligowski). As commandant of the 20th Infantry Brigade, he fought in the Polish-Soviet War, including the Battle of Warsaw (1920) and in Eastern Galicia.