On 1 September, the Belgians received information that the Germans were preparing to advance towards the Belgian western flank, on the Scheldt at Dendermonde. The Belgian commanders had received reports that the IX Reserve Corps and the 6th Division of the III Reserve Corps, were being relieved by the Marine Division and troops. The Germans had received agent reports of an imminent sortie from Antwerp, troops concentrations in western Belgium and northern France and the arrival of more British troops at Ostend. With the concentration of more troops and at Brussels underway, the reports caused no alarm.