Gravity-throwing trebuchets have been spotted in the Israeli army on the border with Lebanon. Previously, trebuchets were seen in Syria. There are no official comments yet from the leadership of the Israeli army. The first mention of a trebuchet throwing machine appeared in China in the 5th century BC, then in a modified form they appeared all over the world. Trebuchet are usually intended for the siege of cities, but in history there have been cases of their use on ships. Building a trebuchet in such a way as to ensure the required range, accuracy and reliability of fire is not easy. All proportions must be perfectly balanced, and this can be achieved either by knowledge of geometry and mechanics, or by long practical experience.