1917 (Nov 17) Y.M.C.A. printed stampless envelope to Rio Tinto, Porto cancelled C.E.P. /S.P.C. 7 cds & with red framed arched Censurado /No 34 & on reverse Rio Tinto (27 Nov) arrival cds ………………….. Portugal was neutral until Germany on 9 Mar 16 & Austro-Hungary on 15 March declared war due to the Portuguese seizing 63 ships that had been interned under the neutrality act in Portuuguese ports since war commenced. Subsequently Portugal sent 2 Infantry Divisions to the Western Front on 3 Feb 1917.