ushing ▁from ▁St . ▁Petersburg ▁to ▁assume ▁command ▁of ▁Russian ▁forces , ▁learned ▁about ▁the ▁deb acle ▁at ▁Hamburg ▁and , ▁de em ing ▁the ▁campaign ▁to ▁be ▁do omed , ▁prompt ly ▁returned ▁to ▁Russia . ▁ ▁The ▁Republic ans ▁re - occup ied ▁all ▁the ▁positions ▁from ▁which ▁they ▁had ▁been ▁driven , ▁and ▁their ▁general ▁line ▁of ▁defence ▁was ▁now ▁covered ▁on ▁the ▁right ▁by ▁in und ations , ▁the ▁only ▁roads ▁across ▁which ▁were ▁covered ▁by ▁field ▁works . ▁The ▁space ▁between ▁Al k ma ar ▁and ▁the ▁Zu ider ze e ▁was ▁thus ▁rendered ▁def ens ible ▁by ▁small ▁numbers , ▁and ▁Amsterdam ▁was ▁secured ▁on ▁the ▁land ▁side . ▁The ▁remainder ▁of ▁the ▁army , ▁which ▁had ▁been ▁rein for ced , ▁was ▁concentr ated ▁between ▁the ▁L anged ijk ▁and ▁the ▁sea , ▁and ▁the ▁post ▁of ▁O ud kar sp el ▁was ▁strength ened ▁by ▁additional ▁works , ▁and ▁by ▁in und ations . ▁Sch o orld am ▁and ▁Ko ed ijk ▁were ▁also ▁fort ified . ▁The ▁next ▁major ▁eng agement ▁took ▁place ▁at ▁Cas tr icum ▁on ▁ 6 ▁October . ▁ ▁References ▁ ▁Bibli ography ▁▁ ▁Smith , ▁Dig by . ▁The ▁Napole onic ▁Wars ▁Data ▁Book . ▁Green hill , ▁ 1 9 9 8 . ▁The ▁above ▁text ▁is ▁an ▁extract ▁from ▁an ▁article ▁compiled ▁by ▁the ▁British ▁Army ' s ▁Int elligence ▁branch ▁of ▁the ▁Qu arter master - General ' s ▁department ▁in ▁ 1 8 8 4