Expeditionary warfare is a military invasion of a foreign territory, especially away from established bases. Expeditionary forces were in part the antecedent of the modern concept of rapid deployment
Alexander the Great fighting in India
Empire of Alexander the Great
"Yermak's conquest of Siberia", a painting by Russian artist Vasily Surikov depicting the Russian conquest of Siberia.
A squadron of the Australian Naval and Military Expeditionary Force off New Britain in September 1914
The Canadian Expeditionary Force was the expeditionary field force of Canada during the First World War. It was formed on August 15, 1914, following Britain's declaration of war on the German Empire,
Expeditionary warfare
…Other expeditionary forces during World War I included: Canadian Expeditionary Force, 1914–1920 First Australian Imperial Force (Europe), 1914–1921…
Men lining up outside a recruitment tent in Toronto in 1914.
Members of the 38th Battalion (Ottawa), CEF marching in the streets of Hamilton, Bermuda, in 1915.
Depiction of the Battle of Kitcheners' Wood, an engagement during the Second Battle of Ypres
Canadian soldiers returning from trenches during the Battle of the Somme