Maarten van Rossum (c. 1478 – June 7, 1555) was a military tactician of the duchy of Guelders who became field marshal in the service of Charles, Duke of Guelders. He was greatly feared outside his home country for the ruthless manner in which he waged war. In a long career, he often put his motto ""Blaken en branden is het sieraad van de oorlog" ("Burning and torching is the jewel of war") into practice. His way of waging war was quite similar to that of his Italian colleagues, the condottieri, and was characterized by guerrilla-like tactics, in which the civilian population was spared even less than was usual in his time.