I just think you needed to write a little better, I counted several spelling/grammar errors(""familys again"-families again, "termorary" temporary), poor syntax("When the invasion started, poland was attacked." -if you invade something, naturally it means you're attacking it. "When the invasion began, Poland was amongst the first countries to be attacked. ") and it seems you had difficulty expressing things the way you meant them to be read ("The red army went to help Polish people. They faught with the Nazis." This contradicts itself, though I do see what you meant. When you say "They fought with the nazis", it read as if you were telling me they were allied. "They fought 'against' the Nazis")
I might seem nit-picky, but those little things make the difference.