I am from Poland. This past weekend, I talked with my mother-in-law, who was born in 1935 in France. In 1939, right before World War II broke out, she and her family went back to Poland. I was shocked and asked why they did it. Weren't they aware that Germany could attack Poland? She answered that they were guessing that it may happen but, in case it did happen, they wanted to be eventually on the Polish side. Moreover, she said that her father's brother stayed in France and, when Germany attacked France, he had to fight on the first front. Is it true that France first used people from other countries to fight before starting to use French people?