Pransiya Imperyong Briton Imperyong Ruso ( 1914  @-@  17 ) Estados Unidos ( 1917  @-@  18 ) Italya ( 1915  @-@  18 ) Imperyo ng Hapon Belhika Serbiya Montenegro Rumanya ( 1916  @-@  18 ) Portugal ( 1916  @-@  18 ) Gresya ( 1917  @-@  18 ).
