Blizzard is trying its best to stop bots in World of Warcraft Classic from linxue's blog

This delivery denotes the beginning of the Ahn'Qiraj War Effort, which ultimately prompts the kickoff of the 20-player Ruins of Ahn'Qiraj attack and the 40-player Ahn'Qiraj assault WOW Classic Boosting. The War Effort will have major parts in both Alliance and Horde groups contributing materials to a worker wide objective, which will open up the two assault variations. 

Accordingly, there will be a postponement between the dispatch on July 28 and the launch of the actual attacks mmobc.com. The timeframe will vary contingent upon how effectively every worker seeks after the War Effort, however Blizzard says the most punctual the mission can complete is "a little more than seven days" after the beginning of Phase 5.