Question

but there are several other brigades and dozens of independent battalions working independently, and fights are common.
source: reuters
in the sentence above, battalions has the same or almost the same meaning as:
benisons
regiments
garrisons
odaments

Explanation:

A battalion is a military unit. A regiment is also a military - level unit and is similar in meaning to battalion. Benisons mean blessings, garrisons refer to troops stationed in a fort or town, and oddments mean miscellaneous small items or remnants.

Answer:

B. regiments