Here is an anthology on the subject

Compound Warfare: An Anthology, Thomas M. Huber, editor. Final Version. (PDF)

In the long history of warfare, a recurring theme is the combined use of regular and irregular forces to pursue victory. The American colonists relied upon regular Continental Army troops and local militia in their war for independence. British troops commanded by Wellington fought alongside Spanish peasant guerrillas against Napoleon in Spain. The Chinese Communists under Mao Zedong organized local militia units, regional forces, and a regular army for use in their struggle to topple the Nationalist government. In these and many other cases, the practice of employing regular and irregular forces together was not only applied, but also instrumental in bringing victory to the side that at the beginning of the conflict seemed clearly inferior to its opponent.

In 1996, in an article entitled “Napoleon in Spain,” Dr. Thomas M. Huber of the Combat Studies Institute (CSI) coined the term “compound warfare” to describe this phenomenon of regular and irregular forces fighting in concert, as he examined the reasons for Napoleon’s failure to pacify the Iberian Peninsula. The article, written to support CSI’s course in modern warfare at the U.S. Army Command and General Staff College, received high praise from student officers, from the CSI faculty, and from the Institute’s director at the time, Colonel Jerry Morelock. Impressed by Dr. Huber’s analysis of the synergistic effects achieved by Wellington’s British Army and Spanish guerrillas as they worked together against Napoleon’s forces, Col. Morelock suggested that other members of CSI examine examples of this pattern of warfare in other times and places. This book is a compilation of their studies.