December 08, 1866
To the House of Representatives:
In reply to a resolution of the House of Representatives of the 5th instant, inquiring if any portion of Mexican territory has been occupied by United States troops, I transmit the accompanying report upon the subject from the Secretary of War.
ANDREW JOHNSON.
Andrew Johnson, Special Message Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/202602