miles.

April 11 It was officially announced that
18,000 Americans were now on the
border while 12,000 have penetrated
375 miles.

April 16 A false report of Villa's death.

April 23-29 Conferences are held at El Paso
between American and Mexican officials.
The Americans ask for the active
cooperation of the forces of Carranza.
Skirmishes are reported in
Mexico and raids are made on the
frontier by followers of Villa.

May 9 President calls the militia of Texas,
New Mexico and Arizona to the border.
Additional regular troops are also
sent.

May 22 Carranza protests to the United
States against the violation of Mexican
sovereignty.

June 18 President calls many militia units to
the federal service for duty on the
frontier and in mobilization camps.

June 20 In a note to Carranza the President
declines to withdraw American troops.

June 21 A force of Carranza's men attack a
scouting body of U. S. cavalry at Carrizal.
A score of Americans are killed and 22 made
prisoners.

June 22 Secretary of State Lansing informs
the governments of South and Central
America concerning the intentions of
the United States in Mexico.

June 24 Carranza again demands that American
troops must not advance west, east
or south in Mexico.

June 25 Secretary Lansing enters a demand
for the return of the prisoners at
Carrizal.
In the same letter he also declares
that the action at this place was
a "formal avowal of deliberately
hostile action." He also inquires
what Carranza's intentions are.

June 28 Carranza orders the release of the
prisoners at Carrizal.

July 1 American troops in Mexico are gradually