Then again, if I was Sirius, I would have probably utilized that army that I was a part of instead of going after Peter on my own. I mean, I wouldn’t have trusted Dumbledore but you know…there was Remus, Moody, Professor McGonagall, Hagrid, Andromeda, the Weasleys, Frank, Alice, literally an entire army right there, ready to serve, so that I wouldn’t have to run off after my enemy alone, prompting said enemy to kill thirteen people and frame me.
I feel like a lot of Sirius’ problems could have been avoided if he had just put some rational logic into things.
Then again this is the guy whose brother was like, “I shall defeat Voldemort on my own while telling nobody except for him and even then, it’ll be cryptic and I shall be dead!”
Conclusion: The Black Brothers did not belong in Ravenclaw.