The 303 Squadron was a Polish squadron that fought in the Battle of Britain. It was formed in 1940 and was made up primarily of Polish pilots who had previously fought against Germany. During the Battle of Britain, the 303 Squadron was considered nearly unbeatable, having shot down over 120 German planes despite being equipped with older, less maneuverable aircraft. After the war, the squadron was dissolved but some of the Polish pilots could not return home and instead emigrated or trained new RAF pilots.