Meanwhile, to supplement Commonwealth forces, the RAF has been forming units of foreign pilots who have escaped German-occupied countries; the main difficulty is their lack of English-language skills. While on a training flight, a Free Polish Air Force squadron accidentally runs into an unescorted flight of German bombers. Ignoring the commands of their British training officer, they peel off one by one and shoot down several of the bombers with unorthodox aggressive tactics. Park rewards them by elevating them to operational status, leading Dowding to do the same for the Canadian and Czech squadrons as well.