Sweden. Military postal stationary Facit Mu1, The Swedish Åland Detachement 1918. A lovely censored with red Å + censor sign, cancelled "STOCKHOLM 30" 11.4.18 (by the Swedish fieldpostmaster travelling between Stockholm and Åland) from Swedish military at Åland to Stockholm. Sweden sent military forces to the Åland Islands 1918 to protect the civillians from e.g. future terror by Russians, Red or White troops. Very nice quality and a postal history exhibition item!