0 , 0 0 0 . ▁ ▁Battle ▁The ▁al lied ▁army ▁reached ▁U ls an ▁on ▁ 2 9 ▁January . ▁ ▁The ▁battle ▁began ▁with ▁a ▁false ▁retre at ▁that ▁l ured ▁the ▁Japanese ▁g arrison ▁into ▁a ▁front al ▁attack . ▁They ▁were ▁defeated ▁with ▁ 5 0 0 ▁losses ▁and ▁were ▁forced ▁to ▁retre at ▁to ▁T os an ▁for tr ess . ▁The ▁al lies ▁occupied ▁the ▁city ▁of ▁U ls an . ▁ ▁On ▁ 3 0 ▁January ▁the ▁al lies ▁bomb arded ▁the ▁for tr ess ▁and ▁then ▁took ▁the ▁outer ▁wall ▁of ▁T os an . ▁The ▁Japanese ▁abandoned ▁much ▁of ▁their ▁food ▁supplies ▁and ▁retre ated ▁into ▁the ▁inner ▁for tr ess . ▁The ▁al lies ▁assault ed ▁the ▁inner ▁for tr ess , ▁at ▁one ▁point ▁even ▁taking ▁a ▁portion ▁of ▁the ▁wall , ▁but ▁suffered ▁heavy ▁cas ual ties . ▁Their ▁can n ons ▁were ▁of ▁no ▁help ▁either ▁since ▁the ▁for tr ess ▁was ▁situated ▁too ▁high ▁to ▁reach . ▁Event ually ▁the ▁attack ▁was ▁called ▁off ▁and ▁a ▁long ▁sie ge ▁began . ▁ ▁On ▁ 1 9 ▁February ▁the ▁al lied ▁forces ▁attacked ▁again ▁and ▁were ▁rep elled . ▁See ing ▁Japanese ▁rein for c ements ▁arrive , ▁Yang ▁Ha o ▁decided ▁to ▁lift ▁the ▁sie ge ▁and ▁retre at , ▁but ▁the ▁dis organ ized ▁movement ▁led ▁to ▁many ▁st rag gl ers ▁being ▁cut ▁down ▁by ▁the ▁Japanese , ▁leading ▁to ▁heavy ▁cas ual ties . ▁