Yes Americans did support Roosevelt
The main point of the excerpt is that readers should be aware of the damage that the war has done to a generation of men who were impacted by it, and read the book with this idea in mind.
The epigraph wants to make sure that readers who approach this book do it with the same purpose as the one with which the author wrote it. He does not want the readers to think of this book as an accusation, a confession or an adventure.
He said that the Germans were going to occupy czechoslovakia.
The war began when Iraq invaded Iran, it was on September 22 1980. after a long history of border disputes and demands for the overthrow of saddam Hussein’s regime. Itaqi forces did well at the beginning of the war, taking Iranian khuzestan, but before long they were stopped and forced out of iran.