The first time Germany launched a rocket to try to strike a tactical target was I believe the Ludendorff Bridge after the bridge failed to detonate. Hitler was

The first time Germany launched a rocket to try to strike a tactical target was I believe the Ludendorff Bridge after the bridge failed to detonate. Hitler was so unnerved by the prospect of the Allies holding an intact crossing of the Rhine that he ordered every available resource be used to destroy it, which included some V2 rockets. The V2 rockets I believe did more damage to the cities in German hands than to Allied positions (including the bridge itself, which was unharmed by the attack).