Original sentence: Dennis (et al), Peter.However, in the East, opposite Tawau and on the Indonesian half of Sebatik Island were 5 companies of the the Indonesian Marines (Korps Komando Operasi - KKO) as well as a training camp for voluteers.One of their 'posts' was a boat permanently postioned close to the international border across Wallace Bay.Succesful ambushes caught some Indonesians withdrawing by boat.There were also quite a lot of small grass airstrips suitable for light aircarft, as dropping zones for parachuted supplies and for helicopters
Edited sentence: Dennis (et al.However, in the East, opposite Tawau and on the Indonesian half of Sebatik Island were 5 companies of the Indonesian Marines (Korps Komando Operasi - KKO) as well as a training camp for voluteers.One of their 'posts' was a boat permanently positioned close to the international border across Wallace Bay.Successful ambushes caught some Indonesians withdrawing by boat.There were also quite a lot of small grass airstrips suitable for light aircraft, as dropping zones for parachuted supplies and for helicopters