The deep pike attack column remained the primary form of effective infantry combat for the next forty years, and the Swabian War saw the first conflict in which both sides had large formations of well-trained pikemen. After that war, its combatants—the Swiss (thereafter generally serving as mercenaries) and their Landsknecht imitators—would often face each other again in the Italian Wars, which would become in many ways the military proving ground of the Renaissance.