Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
고대 전쟁에서 투석포는 적의 성벽을 무너뜨리는 데 사용되었다.godae jeonjaengeseo tuseokponeun jeogui seongbyeogeul muneotteurineun de sayongdoeeotda.In ancient warfare, the ballista was used to break down enemy walls.