The 1st Infantry Regiment (1er RI) is an infantry regiment of the French Army
The 1er RI is the only French infantry regiment to feature a squadron specialised in urban warfare, the Groupe Commando d'Investigation (CGI, "Investigation Commando Group"). The CGI is, with the Compagnie de Combat en zone Urbaine of the 2nd Foreign Parachute Regiment, the benchmark for urban combat in the French military.
it is part of the 1° Mech. brigade