Malayan Emergency followed by Communist insurgency in Malaysia
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 war began on 17 June 1948, after Britain declared a state of emergency in Malaya following attacks on plantations, which in turn were revenge attacks for the killing of left-wing activists. Leader of the Malayan Communist Party (MCP) Chin Peng and his allies fled into the jungles and formed the MNLA to wage a war for national liberation against British colonial rule. Many MNLA fighters were veterans of the Malayan Peoples' Anti-Japanese Army (MPAJA), a communist guerrilla army previously trained, armed and funded by the British to fight against Japan during World War II. The communists gained support from a high number of civilians, mainly those from the Chinese community. The communists' belief in class consciousness, and both ethnic and gender equality, inspired many women and indigenous people to join both the MNLA and its undercover supply network the Min Yuen. Additionally, hundreds of former Japanese soldiers joined the MNLA. After establishing a series of jungle bases the MNLA began raiding British colonial police and military installations. Mines, plantations, and trains were attacked by the MNLA to gain independence for Malaya by bankrupting the British occupation.
The British attempted to starve the MNLA using scorched earth policies through food rationing, killing livestock, and aerial spraying of the herbicide Agent Orange. British attempts to defeat the communists included extrajudicial killings of unarmed villagers, in violation of the Geneva Conventions. The most infamous example is the Batang Kali massacre, which the press has referred to as "Britain's Mỹ Lai". The Briggs Plan forcibly relocated between 400,000 to 1,000,000 civilians into concentration camps called "New villages". Many Orang Asli indigenous communities were also targeted for internment because the British believed that they were supporting the communists.Although the emergency was declared over in 1960, communist leader Chin Peng renewed the insurgency against the Malaysian government in 1967. This second phase of the insurgency lasted until 1989.