Sextus and Octavian accused one another of violating the terms of the Pact of Misenum .
The final straw was the betrayal of Sardinia to Octavian by Menas .
Sextus and Octavian accused one another of violating the terms of the Pact of Misenum , but the final straw was the betrayal of Sardinia to Octavian by Menas .