drop to one knee

опуститися на коліно (прийняти положення для стрільби з коліна) (Aden saw a Somali militiaman with an RPG tube step into the alley and drop to one knee. - Bowden, Mark. Black Hawk Down - p. 81)  (He dropped to one knee and shot them, many of them, but the Somalis’ bullets also hit him. - Bowden, Mark. `Black Hawk Down` - p. 82)