The diary of a raving warmonger.
Though make no mistake, I appreciate this book for the insights it gives putting things into perspective.
Caesar throughout the book fashions himself in an overly positive light and showers himself with never ending victories and an over-eager army to suffer hardship for him, but makes excuses for the few military failures in between or writing off the blame to his officers, but never his men (who do the fighting). Such a thing pointed out in explanatory notes, was common during antiquity, at least among the Romans to be lacking in self-criticism.. Otherwise it simply spelled failure and loss of gravitas, prestige in the public eye. Which brings the issue with how these flights of fancy made Caesar commit the worst of atrocities, such as enslaving whole towns, or slaughtering towns without sparing women or child, it is mentioned in select places albeit bluntly and shortly, which gives us a hint into what kind of war took place.
Just by a quick read on wiki we can see the number estimates of historians on the war casualties;"As many as a million people (probably 1 in 5 of the Gauls) died, another million were enslaved,[22] 300 clans were subjugated and 800 cities were destroyed during the Gallic Wars.[23] The entire population of the city of Avaricum (Bourges) (40,000 in all) were slaughtered.[24] Before Julius Caesar's campaign against the Helvetii (present-day Switzerland), the Helvetians had numbered 263,000, but afterwards only 100,000 remained, most of whom Caesar took as slaves.[25]"
By ancient standards these are large numbers. As a consequence of Caesar's gallivant Gaul was depopulated and colonized by Romans for Romanization, all the while millions of Celts (Gauls) were imported to Rome and beyond to work in farms, brothels and other unpleasant manual labors, due to how Romans considered barbarians uneducated and uncouth, the Greeks had it easy.
Of course all this had made Caesar incredibly rich, rich enough to wage civil wars in his own name and bribe the masses, the elite and his army at the same time. Throughout the books Caesar focuses on his clemency towards the Gauls by not putting every tribe or town that surrenders to the sword or slavery, though most often by necessity than actual leniency.
Those that resisted such as Atuatuci the entire town was enslaved after siege due to feign of surrender by them. The Eburones who hid in the marshes and woods, were enslaved and slaughtered when Caesar called for a "hunt" all Gauls and Germans for easy booty, thus preserving the safety of his Romans. In his campaign to subdue the nearby German migratory tribes he resorted to treachery, captured the envoys/diplomats broke the truce with them and hunted down the men, women and children in their camps, many were slaughtered while Caesar's troops were left unscathed as per usual. When Romans did sustain a few casualties or a pro-longed siege, they would put the entire town to sword not caring for profit or booty only vengeance as was the case with the destruction of Avaricum where 40,000 civilians were killed. On the siege of Alessia, when the Mandubii were expelled from their own town by Vercigentorix army due to lack of food, they flocked to Caesar for shelter or passage, however Caesar gives no mention to their fate. Cassius Dio tells us that Caesar forcefully sent them back to increase pressure on the town, but instead the Mandubii died wretchedly of starvation and thirst before the town gates.
Many towns and villages were burnt down due to Gauls such as Vercingetorix pursuing the scorched earth policy, but how much of this is propaganda I am uncertain as Romans did the same to Gauls whom they could not defeat in pitched battles.
Some interesting historical perspective is put into the final commentary on Vercigentorix and the Great revolt. In many critical moments of the battle, Caesar heavily relied on Germanic cavalry to rout the much more numerous Gauls. This perhaps put much emphasis on why later Roman Emperors relied on Germanic bodyguards, not only for their impartiality on Roman politics but fierceness and bravery.
In the final, eight book by Aulus Hirtius, we get a short, but a bit less embellished picture of Caesar and the Gallic war. For example after the Uxellodunum town surrendered, he fearing that his clemency be taken for granted, cut off the hands of the entire people who had taken arms against him.
Caesar was undoubtedly a talented military commander, orator, and a propagandist. This book is invaluable for those wanting to witness Roman military operations up close.