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>
Britain and the United States agreed to the 49th parallel as the northern boundary of the Louisiana Territory between Lake of the Woods and the Rocky Mountains.(answer already on brainly)
