Who was the two rivals wanted to gain power of Rome?

When his rivals in Rome demanded he return as a private citizen, he used these riches to support his army and marched them across the Rubicon River, crossing from Gaul into Italy. This sparked a civil war between Caesar's forces and forces of his chief rival for power, Pompey, from which Caesar emerged victorious.

To have a bunch of countries to team up, and communicate not let the communist break them apart and take over the world