Scorched earth
The historian Sydney Nettleton Fisher wrote, "The Greek army in retreat pursued a burned-earth policy and committed every known outrage against defenceless Turkish villagers in its path".
Norman Naimark noted that "the Greek retreat was even more devastating for the local population than the occupation".

Second Sino-Japanese War: During the Second Sino-Japanese War, the Imperial Japanese Army had a scorched-earth policy, known as "Three Alls Policy", which caused immense environmental and infrastructure damage to be recorded. It contributed to the complete destruction of entire villages and partial destruction of entire cities.
The Chinese National Revolutionary Army destroyed dams and levees in an attempt to flood the land to slow down the advancement of Japanese soldiers, which further added to the environmental impact and resulted in the 1938 Yellow River flood. In the 1938 Changsha fire, the city of Changsha was put on fire by the Kuomintang  to prevent any wealth from falling into enemy hands.

World War II: At the start of the Winter War in 1939, the Finns used the tactic in the vicinity of the border in order to deprive the invading Soviet Red Army's provisions and shelter for the forthcoming cold winter. In some cases, fighting took place in areas that were familiar to the Finnish soldiers who were fighting it. There were accounts of soldiers burning down their very own homes and parishes. One of the burned parishes was Suomussalmi.
When Germany attacked the Soviet Union in June 1941, many district governments took the initiative to begin a partial scorched-earth policy to deny the invaders access to electrical, telecommunications, rail, and industrial resources. Parts of the telegraph network were destroyed, some rail and road bridges were blown up, most electrical generators were sabotaged through the removal of key components, and many mineshafts were collapsed.
The process was repeated later in the war by the German forces of Army Group North and Erich von Manstein's Army Group Don, which stole crops, destroyed farms, and razed cities and smaller settlements during several military operations. The rationale for the policy was that it would slow pursuing Soviet forces by forcing them to save their own civilians. The best-known victims of the German scorched-earth policy were the people of the historic city of Novgorod, which was razed during the winter of 1944 to cover Army Group North's retreat from Leningrad.

Near the end of the summer of 1944, Finland, which had made a separate peace with the Allies, was required to evict the German forces, which had been fighting against the Soviets alongside Finnish troops in northern Finland. The Finnish forces, under the leadership of General Hjalmar Siilasvuo, struck aggressively in late September 1944 by making a landfall at Tornio. That accelerated the German retreat, and by November 1944, the Germans had left most of northern Finland. The German forces, forced to retreat because of an overall strategic situation, covered their retreat towards Norway by devastating large areas of northern Finland by using a scorched-earth strategy. More than a third of the area's dwellings were destroyed, and the provincial capital Rovaniemi was burned to the ground. All but two bridges in Lapland Province were blown up, and all roads were mined.
In northern Norway, which was also being invaded by Soviet forces in pursuit of the retreating Wehrmacht in 1944, the Germans also undertook a scorched-earth policy of destroying every building that could offer shelter and thus interposing a belt of "scorched earth" between themselves and the allies.
In 1945, Adolf Hitler ordered his minister of armaments, Albert Speer, to carry out a nationwide scorched-earth policy, in what became known as the Nero Decree. Speer, who was looking to the future, actively resisted the order, just as he had earlier refused Hitler's command to destroy French industry when the Wehrmacht was being driven out of France. Speer managed to continue doing so even after Hitler became aware of his actions.
During the Second World War, the railroad plough was used during retreats in Germany, Czechoslovakia and other countries to deny enemy use of railways by partially destroying them.

Malayan Liberation War: Britain was the first nation to employ herbicides and defoliants (chiefly Agent Orange) to destroy the crops and the bushes of Malayan National Liberation Army (MNLA) insurgents in Malaya during the Malayan Emergency. The intent was to prevent MNLA insurgents from utilizing rice fields to resupply their rations and using them as a cover to ambush passing convoys of Commonwealth troops.

Goa War: In response to India's invasion of Portuguese Goa in December 1961 during the annexation of Portuguese India, orders delivered from Portuguese President Américo Tomás called for a scorched-earth policy for Goa to be destroyed before its surrender to India.
However, despite his orders from Lisbon, Governor General Manuel António Vassalo e Silva took stock of the superiority of the Indian troops and of his forces' supplies of food and ammunition and took the decision to surrender. He later described his orders to destroy Goa as "a useless sacrifice" (um sacrifício inútil)".

Vietnam War: The United States used Agent Orange as a part of its herbicidal warfare program Operation Ranch Hand to destroy crops and foliage to expose possible enemy hideouts during the Vietnam War. Agent Blue was used on rice fields to deny food to the Viet Cong.

Persian Gulf War: During the 1990 Persian Gulf War, when Iraqi forces were driven out of Kuwait, they set more than 600 Kuwaiti oil wells on fire. That was done as part of a scorched-earth policy during the retreat from Kuwait in 1991 after Iraqi forces had been driven out by Coalition military forces. The fires were started in January and February 1991, and the last one was extinguished by November 1991.

Guatemalan Civil War: Efraín Ríos Montt used the policy in Guatemala's highlands in 1981 and 1982, but it had been used under the previous president, Fernando Romeo Lucas García. Upon entering office, Ríos Montt implemented a new counterinsurgency strategy that called for the use of scorched earth to combat the Guatemalan National Revolutionary Unity rebels. Plan Victoria 82 was more commonly known by the nickname of the rural pacification elements of the strategy, Fusiles y Frijoles (Bullets and Beans).  Ríos Montt's policies resulted in the death of thousands, most of them indigenous Mayans.

Indonesia: The Indonesian military used the method during Indonesian National Revolution when the British forces in Bandung gave an ultimatum for Indonesian fighters to leave the city. In response, the southern part of Bandung was deliberately burned down in an act of defiance as they left the city on 24 March 1946. This event is known as the Bandung Sea of Fire (Bandung Lautan Api).
The Indonesian military and pro-Indonesia militias also used the method in the 1999 East Timorese crisis. The Timor-Leste scorched-earth campaign was around the time of East Timor's referendum for independence in 1999.

Yugoslav Wars: The method was used during the Yugoslav Wars that started in 1991, such as against the Serbs in Krajina by the Croatian Army, and by Serbian paramilitary groups.

Soviet–Afghan War: The Soviet army used scorched-earth tactics against towns and villages in 1983 to 1984 in the Soviet–Afghan War to prevent the return of the Mujahideen by a migratory genocide. The Soviet army used mines extensively in the bordering provinces to Pakistan to cut off weapon supply.

21st century: 

Darfur War: The government of Sudan used scorched earth as a military strategy in the Darfur War that started in 2003.

Sri Lankan Civil War: During the 2009 Sri Lankan Civil War, the United Nations Regional Information Centre accused the government of Sri Lanka of using scorched-earth tactics.

Myanmar civil war: In March 2023, the Office of the United Nations High Commissioner for Human Rights condemned the Burmese military's use of a scorched earth strategy, which has killed thousands of civilians, displaced 1.3 million people and destroyed 39,000 houses throughout the country since the 2021 Myanmar coup d'état, as the military has denied  humanitarian access to survivors, razed entire villages, and used indiscriminate airstrikes and artillery shelling.

In business world: The concept of scorched-earth defense is sometimes applied figuratively to the business world in which a firm facing a takeover attempts to make itself less valuable by selling off its assets.

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References: Ambler, Sophie; Bailey, Mark; Seel, Graham E. (2018). British Depth Studies c. 500–1100 (Anglo-Saxon and Norman Britain). London: Anthem Press. ISBN 978-1-78308-808-9. Retrieved 3 July 2023.
american.edu (2010). "The Economic and Environmental Impact of the Gulf War on Kuwait and the Persian Gulf". Washington, DC: American University. Archived from the original on 19 December 2010.
Billows, Richard A (2008). Julius Caesar: The Colossus of Rome. Routledge. ISBN 9781134318322.
Blackmore, David S.T. (2014).