A new Journal article that has many web links and so could be useful. It ends with:
If the United States intends to assist its allies and partners by building military capacity, a blend of conventional and special operations support is ideal. The combined British-Omani counterinsurgency campaign in Dhofar provides an outstanding template for a balanced security force assistance strategy.
Link: https://smallwarsjournal.com/jrnl/ar...isors-security