In April 1963, the first recorded infiltration and attack occurred in Borneo. An infiltration force training at Nangabadan was split in two and prepared for its first operation. On 12 April 1963, one infiltration force attacked and seized the police station at Tebedu in the 1st Division of Sarawak, about 40 miles from Kuching and 2 miles from the border with Kalimantan. The other group attacked the village of Gumbang, South West of Kuching, later in the month. Only about half returned. The Confrontation could be said to have started from a military perspective with the Tebedu attack.