If you're a member of the U.S. Navy, your organization is part of the Department of Defense." since this Department is in charge of all military branches.
Elastic clause** is the answer due to article 1 section 8
<span>weapons and soldiers</span>
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President Thomas Jefferson commissioned the Corps of Discovery Expedition(1804-06), led by Meriwether Lewis and William Clark, to explore the territory acquired in the Louisiana Purchase, among other objectives. In 1801, Spain signed asecret<span> treaty with France to </span>return<span> Louisiana Territory to France.</span>