▁ ▁and ▁the ▁steam ▁tender ▁Ad ler . ▁The ▁squad ron ▁depart ed ▁for ▁West ▁Africa ▁on ▁October ▁ 3 0 . ▁On ▁reaching ▁the ▁Cape ▁Ver de ▁Islands , ▁it ▁dispatch ed ▁the ▁Ari ad ne ▁to ▁Liber ia ▁and ▁the ▁Guinea ▁coast ▁and ▁the ▁G ne isen au ▁was ▁sent ▁to ▁East ▁Africa . ▁On ▁December ▁ 1 8 , ▁the ▁B ism ar ck ▁and ▁the ▁Ol ga ▁reached ▁the ▁Cam ero on ▁River . ▁ ▁Short ly ▁before ▁the ▁squad ron ▁arrived , ▁the ▁settlement ▁of ▁chief ▁M anga ▁N d um be ▁Bell , ▁who ▁had ▁signed ▁a ▁treat y ▁with ▁Nach t ig al , ▁had ▁been ▁burn ed ▁down ▁and ▁the ▁German ▁flag ▁removed . ▁Admir al ▁Kn orr ▁decided ▁on ▁immediate ▁inter vention ▁and ▁sent ▁landing ▁parties ▁ash ore ▁to ▁destroy ▁the ▁villages ▁of ▁the ▁reb els ▁and ▁arrest ▁their ▁chief s . ▁Two ▁coast al ▁steam ers , ▁the ▁F an ▁and ▁the ▁D ual la ▁were ▁used ▁as ▁landing ▁craft ▁to ▁bring ▁ 3 0 7 ▁soldiers ▁ash ore ▁at ▁H ick ory town ▁on ▁ 2 0 ▁December . ▁The ▁landing ▁party ▁received ▁word ▁that ▁ri ot ers ▁on ▁the ▁opposite ▁bank ▁had ▁attacked ▁the ▁J ant zen ▁& ▁Th orm äh len ▁fact ories ▁and ▁carried ▁off ▁their ▁man agers , ▁and ▁they ▁storm ed ▁J oss ▁town ▁to ▁try ▁and ▁recover ▁them . ▁The ▁next ▁day ▁the ▁Ol ga ▁ste amed ▁up river ▁on ▁the ▁rising ▁t ide ▁and ▁bomb