The White Star Liners Olympic and Britannic were near-identical sister ships of the Titanic which served in the First World War. HMHS Britannic was a hospital ship that sank after apparently hitting a mine in 1916. British Pathé has footage of her construction and launch. RMS Olympic served as a troopship and the archive contains footage of the liner from the 1920s, 1930s, and also from pre-1912 (in the "Titanic Disaster" film). Rohilla and Carmania were also passenger liners which did war service.