 Before being chased out of the country, he may have organized efforts to resist the Poles.An 18th-century author, Johann Filstich, records that Marcu commanded some of the Moldavian military forces, but was easily defeated by Stanisław Żółkiewski.This struggle may also have involved a Ragusan mercenary, Deli-Marko (Delmarco), with whom the Prince is sometimes confused (for instance, in the works of Ilie Bărbulescu).