Both operations combined and relayed their intelligence through the Stallion Project to Australian forces and carried out guerrilla warfare against the Japanese in the region with the full support of the local population.

Meanwhile, Captain D. L. Leach proposed to use former Borneo civil servants to identify and contact locals and Chinese who were still loyal to the Allied forces, to organise them and to establish three main bases along the Baram River, in the Rejang basin, and upriver on the Rejang in preparation to support large scale Allied operations in the area.

The Semut 2 team captured a Japanese communications station at Long Lama several days before the Allied landings around Labuan and Brunei Bay.

On 9 June 1945, on the eve of the Australian landings at Labuan island, the Semut 1 team attacked a small Japanese garrison at Brunei Bay.

[3] On 26 April 1945, a plan named Stallion was implemented to collect intelligence from Operations Semut and Agas regarding the Japanese positions at Brunei Bay.

This information was passed by radio to the 9th Division headquarters on Morotai Island to support future operations in the area by elements of the 20th and 24th Infantry Brigades,[3] which landed in north Borneo on 10 June 1945.

[15] Assisted by the Agas and Semut operations, the Australian 9th Division was able to secure north Borneo, with major combat ending largely by July 1945.

Extensive civic actions began even before the end of the war, with efforts being turned to rebuilding the oil facilities and other damaged infrastructure, establishing schools, providing medical care to local civilians and restoring the water supply.

In June 1945, Semut 1's elements were spread thinly, covering the entire northern Sarawak region and had an outpost at Pensiangan and as far as Tenom in North Borneo.

[3] Semut 2 also expanded their operational area to Bintulu and Upper Rajang in central Sarawak and trained a 350-strong local guerrilla force.

The local population was unable to differentiate facts and opinions from rumours circulating the region and subsequently passed incorrect information to the Australian forces.