Belgian Congo. (Occupation Of German East Africa). 1917. Registered envelope written from Kassala addressed to Holland bearing German East Africa Occupation Yvert 33, 50c black and carmine tied by Kigoma double ring '4th July' with registered label and hand-struck 'Est African Command/ Occupation Belge/ District d'Udjidji' on reverse with 'Censure Militaire' routed via London 'Sept 17' and Baarif arrival. Scarcer item of censored mail from the Occupation of German East Africa.