▁along ▁the ▁Lake ▁Sus u pe ▁and ▁advanced ▁towards ▁the ▁highest ▁point ▁of ▁Sa ip an , ▁Mount ▁T ap och au . ▁Wal lace ' s ▁mar ines ▁conquer ed ▁the ▁sum mit ▁of ▁M t . ▁T ap och au , ▁an ▁ideal ▁observation ▁post ▁over looking ▁central ▁Sa ip an . ▁The ▁ 8 th ▁Mar ines ▁subsequently ▁rep elled ▁several ▁small ▁Japanese ▁counter - att acks ▁and ▁advanced ▁to ▁Tan ap ag ▁Har bor , ▁where ▁it ▁was ▁placed ▁in ▁the ▁reserve ▁on ▁July ▁ 4 , ▁ 1 9 4 4 . ▁ ▁After ▁a ▁brief ▁rest ▁and ▁ref it , ▁Wal lace ▁and ▁his ▁ 8 th ▁Marine ▁Regiment ▁land ed ▁on ▁T in ian ▁on ▁the ▁morning ▁of ▁July ▁ 2 5 , ▁ 1 9 4 4 , ▁and ▁met ▁only ▁light ▁Japanese ▁fire ▁on ▁the ▁be aches . ▁U sh i ▁Point , ▁to ▁the ▁north ▁of ▁the ▁island , ▁was ▁the ▁main ▁objective ▁for ▁this ▁campaign . ▁The ▁ 8 th ▁Mar ines ▁captured ▁the ▁abandoned ▁air field ▁on ▁July ▁ 2 6 . ▁The ▁advance ▁of ▁the ▁ 8 th ▁Mar ines ▁was ▁slow ed ▁down ▁and ▁finally ▁halt ed ▁by ▁a ▁ty ph oon , ▁which ▁occurred ▁on ▁July ▁ 2 8 . ▁Wal lace ▁was ▁ordered ▁to ▁renew ▁the ▁advance ▁on ▁July ▁ 3 0 ▁and ▁subsequently ▁received ▁orders ▁for ▁a ▁final ▁attack ▁on ▁Japanese ▁units ▁fort ified ▁on ▁the ▁cl iff ▁in ▁the ▁north ▁of ▁the ▁island . ▁T