A wannan lokacin, ban da cewa kasar ta kasance daya daga cikin gandun daji, sabili da haka mafi rashin amfani ga ayyukan soja, 'yan Burtaniya ba su san komai ba game da cikin Birnin Upper Burma; amma jiragen ruwa na Burtaniya sun yi shekaru suna gudana a kan babbar hanyar kogin Irrawaddy, daga Rangoon zuwa Mandalay, kuma a bayyane yake cewa hanya mafi sauri da kuma gamsarwa ta aiwatar da yakin Birtaniya ita ce ci gaba ta hanyar ruwa kai tsaye a kan babban birnin. Bugu da ƙari, yawancin jiragen ruwa masu sauƙi da jiragen ruwa (ko ɗakuna), na Kamfanin Irrawaddy Flotilla karkashin ikon Frederick Charles Kennedy, suna samuwa a Rangoon, kuma ilimin da ke cikin gida na jami'an kamfanin na kogi na kogi yana da wuyar kariya ga sojojin Birtaniya.
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