Under the Constitution, the President as Commander in Chief of the Army and Navy is the supreme military commander charged with the responsibility of protecting and defending the United States. ... Thus the Con- stitution speaks of the power of the Congress “to raise and support Armies,” art.
his conquests do not enlarge the boundaries of this Union, nor extend the operation of our institutions and laws beyond the limits before assigned to them by the legislative power
If the speaker is using the pronoun "I," that means they must be telling the story in the first person. They appear in the story and tell it from their own point of view.