Archery

Archery is a means of attacking/utilizing a bow and arrow or Crossbow.

Description
The twin archers are Apollo and Artemis, the patron gods of archery. Archers are used for support and defense, firing either precision shots, aiming at a specific target, or as a volley, where the archers would aim upwards and fire in a large mass (used to hit a large a number of enemies without aiming for anyone in particular). It`s one of the oldest types of hunting ever created.

At Camp Half-Blood
Archery is practiced by the campers and is taught by Chiron and a member of the Apollo cabin. Mostly only Apollo's cabin members use a bow and arrow, but it isn't limited to only them. The Hunters of Artemis also use a bow an arrow in their daily lives.

At Camp Jupiter
Archery is looked down upon unless the user of it has a valid reason (e.g. being a child of Apollo). Frank Zhang, son of Mars, is a very good archer, having a combination of regular arrows and trick ones. Despite being much bulkier than children of Apollo, this allows him to fire heavier arrows with more precise aim.

Trivia

 * The two longest shots in history were from Kublai-Khan and from the walls of Jerusalem when the Ottomans were occupying it.
 * Percy Jackson has been mentioned several times in the series to be especially bad at archery.
 * Frank Zhang is the only demigod who uses a bow and arrow as his primary weapon, but isn't a child of Apollo or a Hunter of Artemis.