List of British armies in the First World War

This page is a list of British army-level formations existing during the First World War.

Expeditionary Forces

 * British Expeditionary Force (BEF)
 * First Army
 * Second Army
 * Third Army
 * Fourth Army
 * Fifth Army (originally the Reserve Army)
 * Mediterranean Expeditionary Force (MEF)
 * Dardanelles Army
 * Egyptian Expeditionary Force (EEF)
 * British Salonika Army (BSF)
 * Mesopotamian Expeditionary Force
 * British Force in Italy

Home Forces

 * Central Force
 * First Army
 * Second Army
 * Third Army
 * Northern Army
 * Southern Army