British Legion (disambiguation) explained

British Legion can refer to any of the following:

Royal British Legion, a British charity that provides support to military veterans
Royal British Legion Industries, a British charity, not affiliated with the Royal British Legion, which helps military veterans along with disabled and unemployed people
British Legion (1860), a volunteer military unit composed of English and Scottish volunteers who fought for the unification of Italy from 1860 to 1861
British Legion (American Revolution), a Loyalist cavalry unit which fought in the American Revolutionary War from 1777 to 1782
British Legions (Spanish; Castilian: link=no|Legión Británica), British volunteer units which fought against Spain in the Spanish American wars of independence

Other uses

British Auxiliary Legion, a British expeditionary force sent to Spain in 1835 to fight in the First Carlist War
British German Legion, a unit of German troops recruited to fight for Britain in the Crimean War from 1855 to 1856
British Legion Volunteer Police Force, a short-lived police force established in response to the outcome of the Munich Agreement in September 1938
Legio II Britannica (Roman Empire); see List of Roman legions