Mixed Blessing: Texas Rangers in the Mexican War

As part of his Masters in Military Science degree, Major Ian Lyles discussed the Texas Rangers as part of Compound Warfare in the Mexican-American War.  Texians - as they were called at the time - had spent a decade fighting both Mexicans and Comanche.  During that time, they developed a mode of fighting that was particularly suited to those opponents.  This made the Rangers an ideal addition to the US Army.  Long exposure to Mexican armies taught them that surrender likely meant execution (e.g., Alamo, Goliad, Mier) and white flags were more likely to be a ruse than an honest request to surrender or parley.  Rangers had long operated far from support and thus came heavily armed, typically with a rifle, one or two revolvers, and a Bowie knife.  They proved to be outstanding scouts, excellent skirmishers, effective cavalry, and even competent infantry when needed.

On the other hand, they brought some grudges with them.  Their scouting missions might make detours to capture or kill Mexican bandits.  The Rangers had learned from the Comanche not to take prisoners.  When not actively in the field, they often caused trouble while in the various Mexican cities and towns.  They had rarely been given quarter and were thus inclined not to give it.  Both General Taylor and General Scott learned to keep the Rangers active to avoid the troubles that were stirred up among the Mexican civilians.  However, neither wanted to send the Rangers home; they were extremely effective at countering the guerrilla activity in both the northern theater and on the road from Vera Cruz to Mexico City.

The quality of Texian troops was often equal to the quality of their leader.  When John Hayes, Ben McColloch, or Samuel Walker was in charge, the Rangers caused few problems while resolving many.  When lesser men were in charge, the Rangers could wreak havoc on the locals and incite the local populace.  However, more often than not, it was volunteer troops who caused trouble and Texas Rangers who got the blame.

Lyles returns to the idea of Compound Warfare frequently.  Though Texas Rangers were newly-minted American citizens (and virtually all of them had migrated from the US anyway), they did not operate as either state volunteer units or regular army units.  This irregular force thus became a unique unit that brought skills and abilities unavailable in other forces.  Lyles mentioned the Northern Alliance in Afghanistan as compound warfare.

The paper is available online.  Recommended.