History of the 151st field artillery, Rainbow Division, by Louis L. Collins, lieutenant governor of Minnesota. Edited by Wayne E. Stevens, PH. D. Pub. by the Minnesota War records commission.

6 HISTORY OF THE 151ST FIELD ARTILLERY

attacked the little town of Columbus, killing a number of the inhabitants.
Regular troops stationed in the vicinity came to the rescue, pursued
the bandits to the south, and killed a considerable number. Villa, however, with a large part of his forces, made his escape. On March
10 the commanding general of the southern department was ordered
to send an adequate force, under Brigadier General John J. Pershing,
across the border in pursuit of the outlaws. An expeditionary column
was formed with remarkable speed and on March 15, just five days
later, General Pershing began the pursuit of Villa.
The situation was gravely complicated by the doubtful attitude
which the de facto government assumed toward this invasion of Mexican territory. Actual war appeared imminent. On April 12 occurred
the so-called Parral incident, when a small detachment from General
Pershing's force was attacked by Mexican soldiers near Parral and
two American soldiers were killed and several wounded. Meanwhile,
bandits were making sporadic raids into United States territory, which
resulted in considerable loss of life and property. During the raid at
Glenn Springs, Texas, on May 5, three American soldiers and one
civilian were killed and three American soldiers wounded.
On May 9 the President called out the militia of Texas, New
Mexico, and Arizona, and directed that they be concentrated at places
to be designated by the commanding general of the southern department. As the result of another raid on June 15, at San Ygnacio, Texas, in which four more American soldiers were killed and five more
wounded, the President, on June 18, called out a large part of the organized militia and national guard of the other states of the Union.
The commanding generals of the eastern, central, and western departments were directed on June 23 to transfer to the border each
unit called out as soon as it was reasonably well equipped for field service. The three Minnesota infantry regiments, the 1st, 2nd, and 3rd,
and the field artillery regiment were included under this call. The purpose of the mobilization was not only to protect the border, but to
make possible the exertion of a certain amount of diplomatic pressure
in the negotiations with Mexico and to further the cause of national
military preparedness.
Immediately upon the issuance of the President's call, all members
of the organized militia of Minnesota were directed to assemble with