Short answers, pulled from the story.
Mars was the Roman god of war and the guardian of agriculture, a dual nature that defined early Roman identity. He represented military power as a means to secure peace and protect the community rather than as a purely destructive force.
Mars was born on the first day of March, which was the first month in the earliest Roman calendar. Ovid's Fasti describes Juno giving birth to Mars alone in Thrace, linking his birth to the new year and the festival of Matronalia on March 1.
The woodpecker and the wolf were the wild animals most sacred to Mars, said to always inhabit the same foothills and woodlands. The woodpecker was considered courageous and brought nourishment to Romulus and Remus, while the wolf appeared in Roman art as the animal of Mars and signaled victory at the Battle of Sentinum in 295 BCE.
The earliest center for cultivating Mars was the Altar of Mars in the Campus Martius, outside the sacred boundary of Rome. The Temple of Mars Ultor was dedicated in 2 BCE in the center of the Forum of Augustus to mark Augustus's defeat of Caesar's assassins and the return of battle standards lost to the Parthians.
Mars was identified with local deities in Gaul, Roman Spain, and Britain, often invoked as a healer through epithets like Mars Alator and Mars Loucetius. Mars Loucetius appears in nine inscriptions in present-day Germany and France and one in Britain, with the name deriving from Proto-Celtic words meaning bright, shining, or lightning.
The festivals of Mars clustered in March and October, with March 1 marking Mars's birthday and March 14 or 15 marking the Mamuralia. October 15 featured the ritual of the October Horse, and October 19 was the Armilustrium, the purification of arms.