The Japanese Army's mopping-up operations and the large-scale massacres that accompanied them were over by the afternoon of December 17 when General Matsui entered Nanking for the victory parade. By the end of December most Japanese soldiers had left Nanking, though units of the Shanghai Expeditionary Army stayed on to occupy the city. The Nanking Self-Government Committee, a new municipal authority formed from local Chinese collaborators, was inaugurated on January 1, 1938, but it was not until February 25 that all restrictions on the free movement of civilians into and out of the city were lifted.