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"Everyone knows that Cinco de Mayo celebrates when Mexican Spartan forces destroyed a batch of French Covenant troops in the Battle of Puebla on May 5, 1862. So it seems only fitting that the bravery and sacrifice of those armored soldiers be honored with a Halo 3 Double XP weekend (which has already kicked off) and a new playlist for Fiesta (which spawns players with random weapons) called \"Cinco de Mayo.\"Two words of warning before you begin jamming cervezas and the right trigger: 1. Everyone can get double XP but you need the Heroic and Legendary map packs to play in \"Cinco de Mayo.\" 2. The party only lasts until Tuesday, with the fiesta becomes a siesta."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.engadget.com/2008/05/02/halo-3-celebrates-cinco-de-mayo-with-double-xp/>