Why did Spain claim Texas and California?

Spain claimed Texas and California primarily due to its exploration and colonization efforts in the Americas during the 16th and 17th centuries. Spanish explorers, such as Álvar Núñez Cabeza de Vaca and later Juan Bautista de Anza, documented their travels and established missions and presidiOS to assert Spain's territorial rights. The strategic importance of these regions for trade and defense against other European powers also motivated Spain's claims. Additionally, the desire to spread Christianity among Indigenous populations played a significant role in establishing Spanish presence in these areas.