Sainte Claire was a fictional French town under German occupation in 1944, simulated across Voyager's decks by Hirogen captors who forced the brainwashed crew to live out the Second World War.
The setting dominates the two-part story The Killing Game. Having taken the ship, the Hirogen fit the crew with neural interfaces so that they believe they are characters in holodeck scenarios, and hunt them repeatedly.
In Sainte Claire, Janeway is Katrine, owner of the nightclub Le Coeur de Lion and head of the local Resistance. Seven of Nine sings there as Mademoiselle de Neuf, Tuvok tends bar, Torres plays a pregnant informer and Neelix a courier. Chakotay and Paris arrive with the American army, while the Hirogen play German officers.
Once the interfaces are disabled the fighting spills out of the holodecks through breached bulkheads. It ends in a truce, with Janeway giving the Hirogen holographic technology.