In the initial stages of the war, Russia endured heavy losses at the Masurian Lakes and Tannenberg and it was to the Winter Palace that many of the wounded returned. Rechristened the Tsarevich Alexey Nikolayevich Hospital, from October 1915, the palace was a fully equipped hospital, its staterooms transformed into hospital wards. The Fieldmarshals' Hall became a dressing station, the Armorial Hall an operating theatre. The small throne room became a doctor's mess room, while more lowly staff were accommodated in the Nicholas Hall and the Anteroom. Nurses were housed in the more intimate apartments once reserved for members of the extended Romanov family. The 1812 Gallery became a store room, the vestibule of the Jordan staircase the hospital's canteen, and its landings offices.