At the beginning of the war the existing Boston Army Base, completed October 1918 and previously the Boston Quartermaster Terminal, was converted to function within a port of embarkation by removing the Quartermaster Depot functions that supported operations other than transshipment. The port operated special Army piers and storage facilities for ammunition and explosives with berths for seven ships at Castle Island in Boston harbor.
Initially, the Boston Army Base, which had been completed in October 1918 and previously functioned as the Boston Quartermaster Terminal, was repurposed to serve as a port of embarkation by eliminating its support functions for operations other than transshipment. The port utilized specialized Army piers and storage facilities for ammunition and explosives with berths for seven ships at Castle Island in Boston harbor.