How did pancho villa try to take revenge against the united states?

In the early morning of March 9, 1916, several hundred Mexican guerrillas under the command of Francisco “Pancho” Villa cross the U.S.-Mexican border and attack the small border town of Columbus

After his military defeat, Pancho Villa withdrew to Chihuahua, from where he forged a military coup that would serve to attack the United States after this country opted to give its support to Venustiano Carranza and especially against Woodrow Wilson for the use that Obregon made giant headlights, powered by US electric power, to repel the night attack of the Villista troops in the border town of Agua Prieta, Sonora on November 1, 1915. In January 1916, a group of Villistas commanded by the general of orders Ramón Banda Quesada ambushed a train of the Mexico North Western Railway (Compañía del Ferrocarril Noroeste de México), near Santa Isabel, Chihuahua, and massacred 18 US employees of the mining company ASARCO.

Before dawn on March 9, 1916, a group of approximately 1,500 men (the official report of the US Army mentioned among "500-700 participants") of Villa's army, commanded by General Ramón Banda Quesada, attacked the town of Columbus (New Mexico), in retaliation for the official recognition of the Carrancista regime by the United States and in search of the merchant Sam Ravel (supplier that, according to Villa, had stolen it) .The invasion of Pancho Villa into New Mexico was the only one invasion that the United States had in its territory since the Anglo-American War of 1812.

the answer for 3 is b and the answer for 4 is d