Final answer:
Decius Brutus decoyed Caesar to the Senate on the day of his assassination, and Trebonius detained Mark Antony to prevent him from interfering.
Step-by-step explanation:
In Shakespeare's play Julius Caesar, it was Decius Brutus who lured Caesar to the Senate on the day of his assassination, not by leading Antony away but by convincing Caesar himself to ignore the warnings of his wife and attend the session. Antony, an ally and loyal friend to Caesar, was subsequently detained by Trebonius, another conspirator, as part of the plot to murder Caesar. Decius Brutus used flattery and manipulation, whereas Trebonius's aim was to keep Antony occupied and away from any potential interference with the assassination. After Caesar's death, Mark Antony and Octavian (also known as Augustus) eventually formed the Second Triumvirate and avenged his murder, marking a critical shift in Roman history from the Republic to the Empire.