The Malayan Emergency, also known as the Anti–British National Liberation War (1948–1960), was a guerrilla war fought in British Malaya between communist pro-independence fighters of the Malayan National Liberation Army (MNLA) and the military forces of the Federation of Malaya, British Empire and Commonwealth. The communists fought to win independence for Malaya from the British Empire and to establish a socialist economy, while the Malayan Federation and Commonwealth forces fought to combat communism and protect British economic and colonial interests. The term "Emergency" was used by the British to characterise the conflict in order to avoid referring to it as a war, because London-based insurers would not pay out in instances of civil wars.

The Malayan Peoples' Anti-Japanese Army (MPAJA) was a communist guerrilla army that resisted the Japanese occupation of Malaya from 1941 to 1945 in World War II. Composed mainly of ethnic Chinese guerrilla fighters, the MPAJA was the largest anti-Japanese resistance group in Malaya. Founded during the Japanese invasion of Malaya, the MPAJA was conceived as a part of a combined effort by the Malayan Communist Party (MCP) and the British colonial government, alongside various smaller groups to resist the Japanese occupation. Although the MPAJA and the MCP were officially different organisations, many saw the MPAJA as a de facto armed wing of the MCP due to its leadership being staffed by mostly ethnic Chinese communists. Many of the ex-guerrillas of the MPAJA would later form the Malayan National Liberation Army (MNLA) and resist a return to pre-war the normality of British rule of Malaya during the Malayan Emergency (1948–1960).