He was to be lieutenant-governor of Gelderland, and he was to have rank as marshal of the camp in the States' army, with a salary of twelve hundred and fifty guilders a month.

He agreed to resign his famous castle of Blyenbeek, but was to be reimbursed with estates in Holland and Zeeland, of the annual value of four thousand florins.
After this treaty, Martin and his free lances served the States faithfully, and became sworn foes to Parma and the King.

He gave and took no quarter, and his men, if captured, "paid their ransom with their heads." He ceased to be the scourge of Gelderland, but he became the terror of the electorate.

Early in 1586, accompanied by Herman Kloet, the young and daring Dutch commandant of Neusz, he had swept down into the Westphalian country, at the head of five hundred foot and five hundred horse.

On the 18th of March he captured the city of Werll by a neat stratagem.