Final answer:
The signal for Julius Caesar's assassination by the conspirators isn't historically documented with a specific detail, but it took place on the Ides of March (March 15) in 44 BCE during a Senate session.
Step-by-step explanation:
The signal for the conspirators to surround Julius Caesar and assassinate him isn't detailed in historical texts in a manner that specifies a particular gesture or word. However, the assassination took place on the Ides of March (March 15) in 44 BCE when Caesar was scheduled to appear at a session of the Senate. There were deep political tensions and conflicts within Rome, with many senators, including Brutus and Cassius, viewing Caesar's indefinite dictatorship as tyrannical. These political rivalries ultimately manifested in the conspiracy leading to his assassination, reflecting the fragile balance of power and deep-seated fears of autocracy among the Roman elite. The assassination marked the end of Caesar's power and led to further turmoil and the eventual rise of his heir, Octavian.