The verses about marijuana were directed at General Victoriano Huerta.

As one website put it, Huerta was "viejo malandrin, rastrero, hipócrita, estrafalario, borracho, marijuanero, ridículo y malvado."
In order, these epithets are: old highwayman (or pig), hanger-on (or pimp), hypocrite, slovenly or wild man, drunkard, marijuana-smoker, ludicrous and wicked person.
The revolutionary troops sang verses about him and his 'shortcomings'. Three of these verses are given in translation (from Frances Toor) 04 Feb 08, and in Spanish by Joe Offer, verses 1, 2, 4, 08 Aug 98, thread 5841: La Cucaracha

Huerta's career is summarized fairly well in Wikipedia. His dictatorship was one of the reasons for American troops landing at Veracruz.
After repeated field defeats of Huerta's federal army by Obregón and Pancho Villa, Huerta resigned the presidency on July 15, 1914.