After this they undertook search and destroy operations around Nui Dat, however contact with the VC during this time was limited. In December 1967, 1 ATF was expanded to a brigade-group with the arrival of a third infantry battalion, 3 RAR, and a quantity of Centurion tanks. Between 24 January and 1 March 1968, 7 RAR deployed to Bien Hoa–Long Khanh border along with 2 RAR and subsequently took part in Operation Coburg during the Tet Offensive.
Following this, they conducted an extensive sweep operation around Nui Dat, although communication with the enemy was restricted. In December 1967, 1 ATF was elevated to brigade-level status with the arrival of an additional infantry battalion, 3 RAR, and a significant amount of armored equipment. Between January 24 and March 1, 1968, 7 RAR deployed to the Bien Hoa–Long Khanh border area and subsequently took part in Operation Coburg during the Tet Offensive.