1916 censored ‘On Active Service’ cover to England with a two line I.E.F. “B” – F.P.O. No. 321 POSTAGE FREE h/s on the front. On the back is a fine F. P. O. No. 321 17 MA 16 datestamp. The cover has been censored at the lower left. Between 13 MAR 16 and 19 JUL 16 this F.P.O. was at Kahe, Kahe is 14 miles south east of Moshi and close to the Kenya border. The battle at Kahe was the last engagement in that area before the withdrawal of the German troops. This cover was sent within days of the capture of Kahe. Fine and very uncommon.