A totally gratuitous phrase indicating an attitude and, for me, diminishing the impact of the interesting facts you provided.
Well, did you ever know then? If you had, you would have known that the German rocket program, including the rocket powered "Komet", was using technology that was patented in America in 1914 and you would not have posted that Americas rocket programs were based on German Rocketry programs. There is often an assumption, particularly among Americans of German descent, that Germany "invented everything" and lost WWII only because Hitler was an idiot. Not true. The only truly great German weapon of WWII was the 88mm gun. As an anti-aircraft weapon, "88's" were responsible for more downed bombers than German fighters.
The word "verity" is another word for truth. Most of the time truth is fact. What you posted as fact was historically inaccurate. You have just gotten more accurate.