Okay, so, Poland is a country in Europe, and a long time ago, there were some bad people who wanted to take over Poland. These bad people were called the Nazis, and they started a big war called World War II.
During the war, some Polish soldiers escaped to France and Britain to join their armies and help fight the Nazis. These Polish soldiers became a part of the Air Force in these countries, which means they were the ones who flew planes to drop bombs on the bad guys and protect their own people.
The Polish Air Force was really brave and fought really hard, helping France and Britain a lot. They had special planes, like Spitfires and Hurricanes, which were really fast and could shoot down enemy planes.
In the end, France lost the war and the Polish Air Force had to leave France and join Britain. The Polish pilots in Britain became really important and flew a lot of missions, protecting their country from the Nazis.
Overall, even though they were in a different country fighting for a different cause, the Polish Air Force did a really good job during World War II and helped make the world a better place.