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 OlympusEdit

The Son of NeptuneEdit

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, also giving him a quest in the process.

The Mark of AthenaEdit

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