Unless told otherwise, keep the dogs completely separated from one another.
Aggression can occur due to insecurity, heightened arousal, or due to redirection from another source.
The goal is to manage these situations as much as possible.
Read the dogs' body language and be vigilant. Take breaks and separate if they appear tense or irritable.
Use confinement or "crate and rotate" techniques as needed to prevent unsupervised access to each other.
Food, chews, bones, rawhides, toys, etc. should ONLY be given when the dogs are physically separated. Do not leave these items out and available for the dogs to access freely.
Be prepared to break up a fight if needed.