After the devastating
siege of Ostend, on 2 July 1605, the Dutch headquarters received reports that Don
Ambrosio Spinola with
Spain's main army of Flanders was headed towards the strongholds of the
Rhine, in
Cologne. Maurice and his commanders, who had been secretly planning to lay siege to
Antwerp, had to abandon all hope. The movements of Ambrosio Spinola not only prevented the Dutch troops from landing near Antwerp, but also forced the Dutch to abandon their attempt to capture other minor towns. The
States-General, alarmed by the Spanish advance, ordered Prince Maurice to head for the Rhine with all of his troops. At the end of July, leaving behind 50 infantry companies to guard
Ijzendijke, Maurice quickly moved the rest of his army, including 61 infantry companies and 6 cavalry companies, towards
Deventer. He arrived there on 10 August. The Dutch garrison surrendered to the Spaniards the next day. On the same day, Spinola's army marched on
Lingen. ==Siege of Lingen==