Later in 1939, the 2nd Division was under 3rd Army which was facing the southern half of the border of the Maritime province of the Soviet Union from Korea northward. The Katayama Detachment from 2nd Division, (consisting of the 15th Infantry Brigade, with 16th and 30th Infantry Regiments, and a field artillery battalion) fought small actions near Akiyama heights, or Heights 997 on 6–10 September 1939, in the closing stages of the Battle of Khalkhin Gol 2nd Division (and the 4th Division) as part of the Japanese Sixth Army. Because the projected counterattack that was canceled when a ceasefire was signed 16 September 1939, the fighting ceased.