During the first years after the truce, the Spanish appeared to have the upper hand after they took Breda in 1624. Somewhat later the Dutch took Oldenzaal in 1626 and Groenlo in 1627. In April 1629 the Dutch then started the campaign that would lead to the successful Siege of 's-Hertogenbosch. Just in time the commander of Crèvecoeur got orders to arrest some ships that were planning to bring supplies to the city. On 30 April 's-Hertogenbosch was closed in. Now a fleet of supply ships was sent to deliver everything that was needed for the siege to Crèvecoeur. Its role as a supply hub for the siege was further strengthened by making a ship-bridge across the Meuse. During the siege the fort had at least 18 cannon, but it was not in the front line. After 's-Hertogenbosch had been conquered by the Republic, Crèvecoeur continued to guard the Dieze. West of it, near Bokhoven a warship guarded the Meuse towards Holland.