How did Battery A become recognized as New Mexico's heroes?

Battery A is recognized as New Mexico's heroes primarily due to their significant contributions during World War I, particularly under the command of General John J. Pershing. The correct answer highlights that General Pershing personally acknowledged their bravery and effectiveness by writing a citation letter that celebrated their role in destroying a key bridge. This act not only demonstrated their tactical prowess and combat effectiveness but also served to elevate their status and recognition within military history.

While it's true that public recognition from a U.S. President and efficient use of ammunition could contribute to their legacy, the citation letter specifically authored by General Pershing serves as a tangible acknowledgment of their direct achievements in battle. This letter is often referenced as a crucial piece in solidifying Battery A's reputation and honors, thereby making it a focal point for their legacy as heroes of New Mexico.