Desiring to protect its claimed territories in North America against further incursions by European powers, the Spanish Crown issued an "asiento" to Menéndez, signed by Philip II on March 20, 1565, granting him expansive trade privileges, the power to distribute lands, and licenses to sell 500 slaves, as well as various titles, including that of "adelantado" of Florida. Menéndez was commissioned to reconnoiter North America from the Florida Keys to present-day Canada, and report on its coastal features, with a view to establishing a permanent settlement for the defense of the Spanish treasure fleet. He was ordered as well to drive away any intruders who were not subjects of the Spanish crown.