 In April 1918 , Körös , along with three other monitors , two patrol boats and a tug , were formed into Flottenabteilung Wulff ( Fleet Division Wulff ) under the command of Flottenkapitän ( Fleet Captain ) Olav Wulff . Flottenabteilung Wulff was sent through the mouth of the Danube and across the Black Sea to Odessa , where it spent several months supporting the Austro @-@ Hungarian troops enforcing the peace agreement with Russia . It returned to the Danube at the end of August , and was anchored at Brăila on 12 September . On 16 October , Körös and the rest of the First Monitor Division sailed from Brăila to Belene . For several weeks the Danube Flotilla was engaged in protecting Austro @-@ Hungarian troops retreating towards Budapest , fighting French and irregular Serbian forces as they withdrew ; the flotilla arrived in Belene on 6 November . 
