 One of the first tasks for the new army was to suppress the smuggling of slaves from Pangani on the mainland to the island of Pemba , north of Zanzibar . The troops completed this mission , capturing several slavers and hindering the trade . Mathews retired from the Royal Navy in June 1881 and was appointed Brigadier @-@ General of Zanzibar . In 1880 , the Sultan dispatched a military force under Mathews to bring his unruly African mainland territories under control . Mathews ' expedition was initially intended to reach Unyanyembe but his men refused to march inland and , when made to do so , deserted in large numbers . The expedition ended instead at Mamboya where a 60 @-@ man garrison was established . This had been reduced to a mere handful of men by the mid @-@ 1880s but the expedition proved that the Sultan was serious about maintaining control of all of his possessions . Mathews ' men were also involved in several expeditions to halt the land @-@ based slave trade which had developed once the seas became too heavily policed for the traders . 
 One of the first tasks for the new army was to suppress the smuggling of slaves from Pangani on the mainland to the island of Pemba , north of Zanzibar . The troops completed this mission , capturing several slavers and hindering the trade . Mathews retired from the Royal Navy in June 1881 and was appointed Brigadier @-@ General of Zanzibar . In 1880 , the Sultan dispatched a military force under Mathews to bring his unruly African mainland territories under control . Mathews <a href='null_genetive' title='1'><mark>'</mark></a>expedition was initially intended to reach Unyanyembe but his men refused to march inland and , when made to do so , deserted in large numbers . The expedition ended instead at Mamboya where a 60 @-@ man garrison was established . This <a href='been_done' title='2'><mark>had</mark></a> been reduced to a mere handful of men by the mid @-@ 1880s but the expedition proved that the Sultan was serious about maintaining control of all of his possessions . Mathews <a href='null_genetive' title='3'><mark>'</mark></a>men <a href='uninflect' title='4'><mark>were</mark></a> also involved in several expeditions to halt the land @-@ based slave trade which <a href='been_done' title='5'><mark>had</mark></a> developed once the seas became too heavily policed for the traders . 
One of the first tasks for da new army was to suppress tdasmuggling of slaves from Pangani on thdaainland to the island of Pemba , north of Zanzibar . The troops completed dis mission , capturing several slavers and hindering the trade . Mathews retired from the Royal Navy in June 1881 and was appointed Brigadier @-@ General of Zanzibar . In 1880 , the Sultan dispatched a military force under Mathews to bring his unruly African mainland territories under control . Mathews  expedition was initially intended to reach Unyanyembe but his men refused to march inland and , when made to do soo , deserted in bigass numbers . The expedition ended instead at Mamboya where a 60 @-@ man garrison was established . Tdisdone been reduced to a mere handful of men by the mid @-@ 1880s but the expedition proved dat the Sultan was serious bou maintaining control of all of his possessions . Mathews  men was also involved in several expeditions to halt thedand @-@ based slave trade which done developed once the das became too heavily policed for the tdaers .