I read a sentence in a chapter in my book which was:
The proclamation that was issued under the name of Bahadur Shah appealed to the people to join the fight under the standards of both Muhammad and Mahavir.
Could the noun "standard" mean "flag or banner of a military organization" figuratively in this context? But then I thought "under the standards of" would have been an established idiom but I could not find any mention of it. So I want to ask whether my surmise is correct. For those who don't know, Mahavira and Muhanmad are deities in Hindu mythology.