Shark Bait is correct.
Cubero is way too far West for the Confederates.
They came up the Rio Grande to Albuquerque, Then to Santa Fe, then E-SE to Glorietta Pass.
There tne Union forces were waiting, the Rebs were defeated and retreated back to Texas.
There was a lot of action at nearby Canoncito
Did somebody mix up Cubero with Canoncito?
CANONCITO - New Mexico Ghost Town