Did the Germans warn Americans not to take the lusitania?

Yes, prior to the sinking of the Lusitania in May 1915, the German government issued warnings about the dangers of traveling on British ships, including the Lusitania, which was believed to be carrying munitions. These warnings were published in newspapers and emphasized that the waters around the British Isles were a war zone. Despite these warnings, many Americans, including those on the Lusitania, chose to travel on the ship, leading to the tragic sinking that resulted in significant loss of life and heightened tensions between the United States and Germany.