The Field of Mars is the location where Roman War Games are carried out at Camp Jupiter. It is located north-east of the via principia.

The Heroes of Olympus

The Son of Neptune

The game Siege (similar to Capture the flag) is played on the field. A team of builders create a large fort for the defending team while the attacking team have Hannibal the elephant. After the game is completed, Mars appears on the field and claims his son, Frank Zhang , also giving him a quest in the process.

The Mark of Athena

The field is seen by Annabeth Chase while the Argo II is flying towards New Rome.

Camp Jupiter
Camp Jupiter: Field of Mars | New Rome | The Temple of Jupiter Optimus Maximus | Little Tiber | Wolf House | The Garden of Bacchus