Mary promoted the sale of Liberty Bonds, through an exhausting series of fund-raising speeches that kicked off in Washington, D.C. where she sold bonds alongside Charles Chaplin, Douglas Fairbanks, Theda Bara, and Marie Dressler.
Sasuen Perang Dunia I ia mapromosiang pangadolan Obligasi Liberty, ngaryanin serangkaian pidarta panggalangan dana intensif, kakawit ring Washington, D.C., ring dije ia ngadol obligasi sareng Charlie chaplin, Douglas Fairbanks, Theda Bara, lan Marie Dressler.