List of wars involving Great Britain

This is a list of wars involving the United Kingdom of Great Britain and Northern Ireland from 1922 to the present day, those involving the Kingdom of Great Britain from 1707–1801 and those involving the United Kingdom of Great Britain and Ireland from 1801–1922.

During its history, British forces or forces with a British mandate have invaded, had some control over or fought conflicts in 171 of the world's 193 countries that are currently UN member states, or nine out of ten of all countries.