World War II: The German 117th Jäger Division destroys the monastery of Mega Spilaio in Greece and executes 22 monks and visitors as part of reprisals that culminated a few days later with the Massacre of Kalavryta.

117th Jäger Division was a German infantry division of World War II. The division was formed in April 1943 by the reorganization and redesignation of the 717th Infantry Division. The 717th Division had been formed in April 1941. It was transferred to Yugoslavia in May 1941, to conduct anti-Četnik and anti partisan and Internal security operations.

Mega Spilaio, formally the Monastery of the Dormition of the Theotokos, is a Greek Orthodox monastery in the municipality of Kalavryta, in the Peloponnese peninsula in southern Greece.

A reprisal is a limited and deliberate violation of international law to punish another sovereign state that has already broken them. Since the 1977 Additional Protocol I to the Geneva Conventions, reprisals in the laws of war are extremely limited, as they commonly breach the rights of non-combatants.

The Kalavryta massacre, or the Holocaust of Kalavryta, was the near-extermination of the male population and the total destruction of the town of Kalavryta, Axis-occupied Greece, by the 117th Jäger Division (Wehrmacht) during World War II, on 13 December 1943.