Editing Mercenary (section)

===United Kingdom===
In the United Kingdom, the Foreign Enlistment Act 1819 and the [[Foreign Enlistment Act 1870]] make it unlawful for British subjects to join the armed forces of any state warring with another state at peace with Britain. During the [[Greek War of Independence]], British volunteers fought with the Greek rebels, which could have been unlawful per the Foreign Enlistment Act. It was unclear whether or not the Greek rebels constituted a 'state', but the law was later clarified to indicate that they were.{{citation needed|date=October 2019}}

The British government considered using the Act against British subjects fighting for the [[International Brigades]] in the [[Spanish Civil War]] and the [[National Liberation Front of Angola|FNLA]] in the [[Angolan Civil War]], but on both occasions chose not to do so.{{citation needed|date=October 2019}}