Initial Indonesian attacks into East Malaysia relied heavily on local volunteers trained by the Indonesian Army. Over time, infiltration forces became more organised with the inclusion of a more substantial component of Indonesian forces. To deter and disrupt Indonesia's growing campaign of infiltrations, the British responded in 1964 by launching their own covert operations into Indonesian Kalimantan under the code name Operation Claret. Coinciding with Sukarno announcing a 'year of dangerous living' and the 1964 race riots in Singapore, Indonesia launched an expanded campaign of operations into West Malaysia on 17 August 1964, albeit without military success. A build-up of Indonesian forces on the Kalimantan border in December 1964 saw the UK commit significant forces from the UK-based Army Strategic Command and Australia and New Zealand deployed roulement combat forces from West Malaysia to Borneo in 1965–66. The intensity of the conflict began to subside following the events of the 30 September Movement and Suharto's rise to power. A new round of peace negotiations between Indonesia and Malaysia began on May 1966, and a final peace agreement was signed on 11 August 1966 with Indonesia formally recognising Malaysia.