Why did Juan Bautista De Anza become an explorer?

Juan Bautista De Anza became an explorer to fulfill his duties as a military officer in the Spanish colonial administration, tasked with expanding Spain's territory in North America. He was appointed to lead expeditions to explore and establish settlements in the region, such as California and Arizona. De Anza's expeditions aimed to strengthen Spain's presence in North America and facilitate trade and colonization efforts.