What countries military bombed the Lusitania?

The Lusitania was not bombed by any military; rather, it was sunk by a German U-boat (submarine) on May 7, 1915, during World War I. The attack was part of Germany's unrestricted submarine warfare campaign, which targeted both military and civilian vessels. The sinking resulted in the deaths of 1,198 people, including 128 Americans, and contributed to shifting public opinion against Germany.