Yes, the Mexican American residents of these territories did become U.S. citizens.
War elephants<span> played a critical role in several key battles in antiquity, but their use declined in the Middle Ages. With the spread of firearms in the early </span>modern period<span>, military </span>elephants<span> were restricted to non-combat engineering and labour roles, and some ceremonial uses.</span>
C. The best answer I can think of
They were referred to as "Royal Colonies"; it's a term with British origins means those territories not annexed yet under its control.
