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.
Battle of Warsaw (1831)
Paskevich, who observed the artillery duel from Fort 55, became convinced that his Polish counterpart would not come to the rescue of Fort 56. Initially hesitant, he finally ordered Russian infantry to attack Fort 56 around 10:00. The attack was carried out by 13 infantry battalions (ca. 6,900 men) from columns commanded by General Lüders and Martinov. The forces of Lüders stormed the obstacles and crossed the stockade, but Polish defenders met them with rifle volleys from within the fort, and the attack was repelled. Lüders quickly ordered his second line (2,300 men) to advance as well. The new forces were twice pushed back into the moat by the commander of the northern wing, Maj. Franciszek Biernacki, but in the end the Polish defenders were overpowered and had to withdraw further into the fort. The Russians followed, but their battalions lost cohesion, which allowed the numerically inferior force under Biernacki to hold out inside the fort and cover the flank of the central wing.