An invasion is a military offensive in which sizable number of combatants of one geopolitical entity aggressively enter territory controlled by another such entity, generally with the objectives of establishing or re-establishing control, retaliation for real or perceived actions, liberation of previously lost territory, forcing the partition of a country, gaining concessions or access to natural resources or strategic positions, effecting a change in the ruling government, or any combination thereof.
Canada Italy Morocco Oman Qatar Syria France Asia-Pacific Mediterranean and Middle East Other campaigns Coups Italy See also: World War I timeline Orange Free State Orange Free State China Serbia Romania Montenegro Bulgarian Legion British India Luang Phrabang Chile Argentina Uruguay France France France Wallachia Uruguay Entre Rios Corrientes Siam Cambodia Native Americans In the Holy Land (1095–1291) Later Crusades (1291–1717) Northern (1147–1410) Against Christians (1204–1588) Popular (1096–1320) Byzantine Empire Sassanid Persia Caucasus Other regions 431–404 BC multiple invasions of Athens and allies by Sparta and allies; multiple invasions of Spartan allies by Athens and allies