The five districts that Pershing established west of the Mexican Central Railway on April 29, 1916, were:
Namiquipa District (10th Cavalry) south of the 30th parallel to Namiquipa;
Bustillos District (13th Cavalry), below the eastern part of Namiquipa District around Laguna Bustillos to San Antonio de Los Arenales and Chihuahua City;
Guerrero District (7th Cavalry), below the western part of Namiquipa District and west of the Bustillos and San Borja Districts;
San Borja District (11th Cavalry), south of Bustillos District between the Guerrero and Satevó Districts to Parral; and
Satevó District (5th Cavalry), southeast of the Bustillos District and east of the San Borja District, south to Jimenez.

The next significant engagement took place on May 5.
A small Carrancista garrison at the silver mining town of Cusihuiriachic was attacked by Villa's forces on May 4, prompting the garrison commander to request help from U.S. forces at nearby San Antonio.
Six troops of the 11th Cavalry, its machine gun platoon, and a detachment of Apache Scouts under 1st Lt.
 James A. Shannon, totaling 14 officers and 319 men, began a night march under Major Robert L. Howze.
Arriving at Cusihuirischic, Howze found that 140 Villistas under Julio Acosta had pulled back into the mountains to the west to a ranch at Ojos Azules, and that the garrison commander had received orders not to cooperate with the Americans.
Howze was delayed three hours in finding a guide and by the time he located the ranch and was deploying to attack, day had broken.
When Acosta's guards and Howze's advance guard exchanged fire, Howze with Troop A immediately ordered a charge with pistols through the hacienda.
Unable to deploy on line, the charge was made in column of fours and closed with the fleeing elements of Villistas.
The other troops deployed to either side of the hacienda attempting to block escape and were supported by plunging fire from the machine gun troop.
Friedrich Katz called the action the "greatest victory that the Punitive Expedition would achieve."
Without a single casualty, the Americans killed forty-four Villistas and wounded many more.
The survivors, including Acosta, were dispersed.

Also on May 5, several hundred Mexican raiders, under a Villista officer, attacked the geographically isolated towns of Glenn Springs and Boquillas in the Big Bend region of Texas.
At Glenn Springs the Mexicans overwhelmed a squad of just nine 14th Cavalry troopers guarding the town, set fire to it, then rode on to Boquillas where they killed a boy, looted the town and took two captives.
Local commanders pursued the Mexicans 100 miles into the state of Coahuila to free the captives and regain the stolen property.
On May 12, Major George T. Langhorne and two troops of the 8th Cavalry from Fort Bliss, Texas, reinforced by Colonel Frederick Sibley and Troops H and K of the 14th Cavalry from Fort Clark, rescued the captives at El Pino without a fight.
Three days later a small detachment of cavalry encountered the raiders at Castillon, killing five of the Villistas and wounding two; the Americans had no casualties.
The cavalry force returned to the United States May 21 after ten days in Mexico.

On May 14, 2nd Lt.
George S. Patton raided the San Miguelito Ranch, near Rubio, Chihuahua.
Patton, a Pershing aide and a future World War II general, was out looking to buy some corn from the Mexicans when he came across the ranch of Julio Cárdenas, an important leader in the Villista military organization.
With fifteen men and three Dodge touring cars, Patton led America's first motorised military action, in which Cárdenas and two other men were shot dead.
The young lieutenant then had the three Mexicans strapped to the hood of the cars and driven back to General Pershing's headquarters.
Patton is said to have carved three notches into the twin Colt Peacemakers he carried, representing the men he claimed to have killed that day.
General Pershing nicknamed him the "Bandito".

The Villistas launched an attack of their own on May 25.
This time a small force of ten men from the 7th Cavalry
The five districts that Pershing established west of the Mexican Central Railway on April 29, 1916, were:
Namiquipa District (10th Cavalry) south of the 30th parallel to Namiquipa;
Bustillos District (13th Cavalry), below the eastern part of Namiquipa District around Laguna Bustillos to San Antonio de Los Arenales and Chihuahua City;
Guerrero District (7th Cavalry), below the western part of Namiquipa District and west of the Bustillos and San Borja Districts;
San Borja District (11th Cavalry), south of Bustillos District between the Guerrero and Satevó Districts to Parral; and
Satevó District (5th Cavalry), southeast of the Bustillos District and east of the San Borja District, south to Jimenez.
The next significant engagement took place on May 5. A small Carrancista garrison at the silver mining town of Cusihuiriachic was attacked by Villa's forces on May 4, prompting the garrison commander to request help from U.S. forces at nearby San Antonio. Six troops of the 11th Cavalry, its machine gun platoon, and a detachment of Apache Scouts under 1st Lt.  James A. Shannon, totaling 14 officers and 319 men, began a night march under Major Robert L. Howze. Arriving at Cusihuirischic, Howze found that 140 Villistas under Julio Acosta had pulled back into the mountains to the west to a ranch at Ojos Azules, and that the garrison commander had received orders not to cooperate with the Americans. Howze was delayed three hours in finding a guide and by the time he located the ranch and was deploying to attack, day had broken. When Acosta's guards and Howze's advance guard exchanged fire, Howze with Troop A immediately ordered a charge with pistols through the hacienda. Unable to deploy on line, the charge was made in column of fours and closed with the fleeing elements of Villistas. The other troops deployed to either side of the hacienda attempting to block escape and were supported by plunging fire from the machine gun troop. Friedrich Katz called the action the "greatest victory that the Punitive Expedition would achieve." Without a single casualty, the Americans killed forty-four Villistas and wounded many more. The survivors, including Acosta, were dispersed.
Also on May 5, several hundred Mexican raiders, under a Villista officer, attacked the geographically isolated towns of Glenn Springs and Boquillas in the Big Bend region of Texas. At Glenn Springs the Mexicans overwhelmed a squad of just nine 14th Cavalry troopers guarding the town, set fire to it, then rode on to Boquillas where they killed a boy, looted the town and took two captives. Local commanders pursued the Mexicans 100 miles into the state of Coahuila to free the captives and regain the stolen property. On May 12, Major George T. Langhorne and two troops of the 8th Cavalry from Fort Bliss, Texas, reinforced by Colonel Frederick Sibley and Troops H and K of the 14th Cavalry from Fort Clark, rescued the captives at El Pino without a fight. Three days later a small detachment of cavalry encountered the raiders at Castillon, killing five of the Villistas and wounding two; the Americans had no casualties. The cavalry force returned to the United States May 21 after ten days in Mexico.
On May 14, 2nd Lt. George S. Patton raided the San Miguelito Ranch, near Rubio, Chihuahua. Patton, a Pershing aide and a future World War II general, was out looking to buy some corn from the Mexicans when he came across the ranch of Julio Cárdenas, an important leader in the Villista military organization. With fifteen men and three Dodge touring cars, Patton led America's first motorised military action, in which Cárdenas and two other men were shot dead. The young lieutenant then had the three Mexicans strapped to the hood of the cars and driven back to General Pershing's headquarters. Patton is said to have carved three notches into the twin Colt Peacemakers he carried, representing the men he claimed to have killed that day. General Pershing nicknamed him the "Bandito".
The Villistas launched an attack of their own on May 25. This time a small force of ten men from the 7th Cavalry 
Pancho Villa Expedition