The Duke of Brunswick immediately ordered the main force of the Prussian Army to defend their position, instructing Blucher to ascertain the enemy's situation without making rash attacks. He then sent out three infantry regiments and one cavalry regiment to construct a defensive line stretching 20 kilometers from Amstelfen to Utrecht to protect the logistics.
Before noon, he received bad news — Blucher's troops were fiercely battling the Dutch by the Sibella River and suffered heavy shelling and encirclement by the enemy forces, with over 800 casualties.
The Duke of Brunswick took a deep breath, not expecting the Dutch to still have the strength to struggle, and he quickly sent reinforcements to Blucher.
By the time the Prussian Army's logistical defense line was established and the vanguard troops had regrouped, two days had passed.