At the time of the attack, Hiroshima was the headquarters of the 2nd General Army and 5th Division. It contained 40,000 Japanese soldiers within the city's limit, and was a beehive (or center) of war industry. The industry manufactured parts for planes and boats, bombs, rifles, and handguns. Children also were shown how to construct and throw gasoline bombs. and the heavy sick were assembling traps to be planted in the beaches of Kyushu. As with other Japanese cities, many of the strategic targets in Hiroshima were mixed with civilian homes and centers made of wood and paper. This made it harder to conduct a successful precision attack. And the highly inaccuracy of the bombing technology in World War II was owed to it. As a result, the city became the first nuclear weapon used against a target in history.