Why did Julius Caesar write the Commentaries in a clear and restrained style?

Julius Caesar wrote his Commentarii in a clear, restrained, and terse style primarily to serve as a sophisticated tool for political propaganda.12

By adopting a factual, dry, and seemingly objective tone, Caesar crafted his accounts to appear impersonal and impartial. This stylistic choice was a calculated effort to influence the reader's perception, subtly guiding them to view his military actions and political decisions in the specific light he desired. Although these writings were designed to promote his own interests, his genius ensured they possessed outstanding literary merit, transforming what were traditionally informal personal notes into a distinct and enduring literary form.21