How to Create a Custom Archive Template for Single Categories?

How to Create a Custom Archive Template for Single Categories?

Archive for events(Category): http://shorturl.staging.wpengine.com/events/aubar/

Archive for all events: http://shorturl.staging.wpengine.com/events/

For some reason they are different(I did edit the main archive template BTW). I can control the archive for all events, but If I'd like to look at events for a specific category, I can't. I haven't been able to find where the code for single category archives are being generated, or how to recreate them.

PS: I don't want to have a separate template for every category, just the same template for ALL archives.