Commentarii de Bello Gallico (English: Commentaries on the Gallic War) is Julius Caesar's firsthand account of the Gallic Wars, written as a third-person narrative. In it Caesar describes the battles and intrigues that took place in the nine years he spent fighting local armies in Gaul that opposed Roman domination.The work has been a mainstay in the teaching of Latin to schoolchildren, its simple, direct prose lending itself to that purpose. It begins with the frequently quoted phrase "Gallia est omnis divisa in partes tres", sometimes quoted as "Omnia Gallia in tres partes divisa est", meaning "All Gaul is divided into three parts".

In this book the famous Gaius Julius Caesar himself describes the seven years of his war in Gaul.When Caesar got proconsul of Gallia and Illyria in 58 B.C, the conquest of land in Gaul was an urgent need, both to improve his political standing and to calm his creditors in Rome. So Caesar claims his interest for a very large area already in the first sentence.His steps and measures always appear clear and logic, but this simplicity is the result of a strict discipline in style. Caesar really choses his words, and the list of standard words that he never or rarely uses, is astonishing...