Final answer:
The Safavid Empire created a new elite military force using enslaved people from the Caucasus and did not specifically employ Italians, Englishmen, or Frenchmen for its modernization efforts. The Ottomans utilized Janissaries and sought European military advice in the 19th century, but this is separate from the Safavid military reforms.
Step-by-step explanation:
The Safavid Empire sought to modernize its military forces during a time of territorial expansion and conflict with neighboring empires. One of the approaches they took was to create a new elite military force. This new force consisted of enslaved peoples from the Caucasus, many of whom served as replacements for the traditional Qizilbash military corps restructured by Shahs Tahmasp and Abbas I. However, historical records do not indicate a collaboration with Italians, Englishmen, or Frenchmen specifically for military modernization purposes. Instead, the Safavids had various interactions with European powers, including alliances and conflicts, but these interactions did not pertain directly to the military restructuring efforts mentioned in the question. The Ottoman Empire had sophisticated military structures, like the Janissaries, and had European advisors and modernization efforts particularly in the 19th century, but this is distinct from the Safavid context.