The E-84 Taiku Class Heavy Tank commonly referred to as either The Crawler or Land Destroyer was a heavy tank that was constructed by the Principality of Zeon during the final weeks of the One Year War, that was used and tested during the Battle of Dagus in order to fend off against the Earth Federation's November Offensive during the Grand Canyon Campaign.
The Taiku was first designed a month prior in October, and was introduced into the war after having to be manufactured from Zeon Occupied North America. It was claimed that the Taiku was one of the most feared tanks of the entire One Year War, as Heirshy mentions that any shoulder or hand held infantry rocket that the Earth Federation possessed at the time could no longer conduct any damage to the armor of the Tank, and that it took a Mobile Suit in order to destroy it completely.
The Taiku's production was stopped following the failed Jaburo Invasion, and the loss of California Base in December of UC 0079, as the war on Earth had completely stopped and was focused more in Space since November.
Production of the Taiku began again 12 years later in UC 0097, during the Zeon Civil War, and was since then produced and manufactured from both Side 3 and Corussilm Colony, and have proven to be a vital asset against the more powerful Zenora Empire.