CHAT MSG BG SYSTEM ALLIANCE

Fired for battleground-event messages that are in blue by default because they are about Alliance actions, e.g. assaulting a graveyard or capture point, or picking up a flag. CHAT_MSG_BG_SYSTEM_ALLIANCE: text, playerName, languageName, channelName, playerName2, specialFlags, zoneChannelID, channelIndex, channelBaseName, unused, lineID, guid, bnSenderID, isMobile, isSubtitle, hideSenderInLetterbox, supressRaidIcons