Excerpt from The Death of Caesar by Barry Strauss, plus links to reviews, author biography & more

That same year Caesar named Decimus admiral for the siege of the city of Massilia (Marseille), an important seaport and naval base on Gaul's Mediterranean coast that supported Caesar's enemies. In the six-month struggle that followed, Decimus destroyed Massilia's fleet. He won Caesar's praise for his vigor, spirit, oratorical skill, foresight, and speed in combat. He gave Caesar's cause a propaganda boost because until then, Pompey had monopolized naval glory.

Caesar now returned to Italy and then turned east for a showdown with Pompey. He left Decimus in Massilia to serve as governor of Gaul through 45 B.C. as his deputy. Decimus then acquired additional military renown by defeating the rebellious Bellovaci, said to be Gaul's best warriors.

Decimus seems as hard as the country in which he spent much of his adult life. He was one of those Romans—they were rare, but probably less rare than the sources admit—who took on the manners and customs of the barbarians he fought. He spoke the Gaulish language, which few Romans did, and he knew the country well enough to be able to put on Gallic clothes and pass as a local.

Around July 45 B.C. Decimus met Caesar in southern Gaul on his way back from Hispania. There Decimus no doubt rendered his accounts of the province that he had governed in the dictator's absence. That Caesar was well pleased with Decimus is clear from the position of honor that Caesar gave him on the return to Italy.

After more than a decade in Caesar's service, Decimus came home rich, a hero, and on the rise. He was about to take office as one of the praetors (high judicial officials) in Rome for the rest of 45 B.C. Caesar had chosen him as governor-designate of Italian Gaul (that is, roughly, northern Italy) for 44 B.C. and consul-designate for 42 B.C.

In short, Decimus was well on his way to restoring his family's fame. There was only one hitch. Decimus's father and grandfather held office by the free choice of the Roman people and at the command of the Senate. Decimus did everything on Caesar's say-so. That accorded poorly with the cherished ideal of every Roman noble, dignitas. It's a difficult word to translate. In addition to "dignity," it means "worth," "prestige," and "honor." Perhaps the best single translation is "rank."

The question now for Decimus was whether he would be satisfied to remain in Caesar's shadow or whether he would insist on being his own man.

MARK ANTONY

As Caesar entered Mediolanum on his return homeward, Mark Antony stood beside him in his chariot. Antony looked the part of a hero. Born on January 14, ca. 83 B.C., he was in the prime of life. He was handsome, strong, and athletic. He wore a beard in imitation of Hercules, the demigod whom his family claimed as an ancestor. The Romans connected Hercules with Hispania, which gave symbolic significance to Antony's presence. His personality conveyed vigor. He was gregarious, intelligent, and self-assured. He drank lustily and in public and endeared himself to his soldiers by eating with them. If Caesar's health had declined at all over the years, as some say, then the robust presence of Antony would prove reassuring.

Antony came from a senatorial family. His father's people, the Antonii, tended to be moderate conservatives, but Antony's mother, Julia, was Julius Caesar's third cousin. Perhaps that was his ticket to Caesar's staff in Gaul, which Antony joined in 54 B.C.

As a youth, Antony had cut a wide swath in Rome, where he became notorious for drinking, womanizing, racking up debts, and keeping bad company. By his mid-twenties, Antony was over his wild ways. He studied oratory in Greece and distinguished himself as a cavalry commander in the East between 58 B.C. and 55 B.C. Already in his earliest armed encounter, he was the first man on the wall during a siege, and he went on in numerous battles to display courage and win victories.

Excerpted from The Death of Caesar by Barry Strauss. Copyright © 2015 by Barry Strauss. Excerpted by permission of Simon & Schuster. All rights reserved. No part of this excerpt may be reproduced or reprinted without permission in writing from the publisher.