Mars was much more important as a roman god than his counterpart in Greece,Ares. In origin he was an agricultural god worshipped by many Roman tribes. His association with spring,the time of regeneration and growth, is shown by naming after him the month of march, which began the Roman year under the pre-Julian calendar. As an agricultural god, Mars was associated with a number of rural gods, such as Silvanus and Flora.
Just as the Roman people turned from farming to war, so mars became a war god. Sacrifices were offered to him before and after a battle, and a portion of the spoils was dedicated to him. The most famous. Also, there was The Campus Martius the open space outside the gates of the ancient city, Where the people could assemble under arms and where they could practice their military skills.