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This is a list of known World War II era codenames for military operations and missions commonly associated with World War II. As of 2022[update] this is not a comprehensive list, but most major operations that Axis and Allied combatants engaged in are included, and also operations that involved neutral nation states. Operations are categorised according to the theater of operations, and an attempt has been made to cover all aspects of significant events. Operations contained in the Western Front category have been listed by year. Operations that follow the cessation of hostilities and those that occurred in the pre-war period are also included. Operations are listed alphabetically, and where multiple aspects are involved these are listed inline.
Flags used are those of the time period.
Excludes North African campaigns
Includes North Sea and Arctic Ocean operations and actions against naval vessels in harbour
Includes operations in Iraq, Syria, Iran, India, Burma, Malaya and Indo-China, and the Indian Ocean
Includes some operations by regular forces in support of partisans
Main article: Anti-partisan operations in World War II
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