 The last of these surrendered on 9 June, while troops from Münster and Cologne simultaneously entered the provinces of Overijssel and Gelderland.On 12 June, the French crossed the Lower Rhine into the Betuwe near Schenkenschans and, recrossing the Lower Rhine to outflank the IJssel Line, occupied Arnhem on 16 June.William's troops, in danger of being cut off from the core province of Holland, retreated through Utrecht behind the Holland Water Line, the inundations being released on 22 June.