Since Sacheon City was located midway between Busan Metropolitan City of the supply base of the Japanese army and Suncheon Waeseong and Namhae Waeseong (Namhae Japanese Castle) at the extreme left wing of the Imperial Japanese Army, the communication with the army on the western side would be cut off if the city fell.
泗川は日本軍の策源地であった釜山広域市と日本軍最左翼の順天倭城・南海倭城の中間に位置する為、ここを落とされると西方にいる軍との連絡が分断される可能性があった。