Answer:
His government was characterized by a very aggressive policy with which he submitted virtually all of the Celtic peoples in several campaigns. His conquests extended Roman rule over the territories that today comprise France, Belgium, the Netherlands and part of Germany. He was the first Roman general to penetrate the unexplored territories of Britain and Germania.
During his government he made many efforts to organize the administrative structures of the new provinces that were annexed to the Republic.
In Rome his political enemies tried to strip him of his army and office using the Senate, in which they were a majority. Julius Caesar, knowing that if he entered the capital he would be tried and exiled, he tried to present himself to the consulate in absentia, to which most of the senators refused. This and other factors prompted him to challenge the senatorial orders. At that time the famous moment occurs in which he crosses the Rubicon River and pronounces the phrase <em>alea iacta est</em> ("the die is cast").
He began a new civil war in which he faced the aristocratic and conservative faction of the Roman Republic, who wished to limit the power of the popular and increase that of the Roman Senate. The victories of Julio Cesar in different battles made him the master of the Republic. He was appointed as consul and life dictator and initiated a series of economic, urban and administrative reforms.
Although under his government the Republic experienced a brief period of great prosperity, some senators characterized Julius Caesar as a tyrant who sought to restore the monarchy.