Most of the division firepower slice plus some corps assets is supporting this regiment. It only has 6 obsolete field guns and a dozen man portable mortars. Reminder an otl 1944 US infantry regiment share of divisional artillery is 12 105mm+ 4 155mm. Organic firepower was 18 81mm +27 60mm mortars and 9 heavy antitank guns. In ttl, instead of a Chinese unit being 1l3rd of a Japanese unit of the same echelon, it may be 35-40% on average.