Battle of the Bzura
The Battle of the Bzura (or the Battle of Kutno) was the largest Polish counter-attack of the German Invasion of Poland, fought between the 9th and 19th of September. The battle took place west of Warsaw, near the Bzura River. It began as a Polish counter-offensive, which gained initial success, but the Germans outflanked the Polish forces with a concentrated counter-attack. This weakened Polish forces and the Poznań and Pomorze Armies were destroyed. Western Poland was now under German rule. The battle has been described as "the bloodiest and most bitter battle of the entire Polish campaign". Winston Churchill called the battle an "ever-glorious struggle". 