Steven J. Zaloga 
Polish Army 1939 45 [PDF ebook] 

Poland was the first of the Allied nations to succumb to German aggression in the Second World War, but by the most tortuous of routes her army managed to remain in the field through all five years of bloody fighting. Polish soldiers fought in nearly every major campaign in the European theatre, and their tale is a complicated and tragic one. This richly detailed text by Steven Zaloga relates the story of the Polish Army during the Second World War, from the first wave of Stukas in 1939 to its eventual conclusion.