Terra's Hammers

Terra's Hammers
"'We are terra's Hammer! the Emperor's thunder! chagre brothers! charge and deny them!' - Chapter Master Alvaro Diaz before the countercharge of the Heavens Gate mountains"The Terra's Hammers are Imperial fists successors of the 12th founding specializing in heavy shock assault based around amassed assault utilizing advanced adaptations of the Codex Astartes tactics primarily situated around sieges and full-scale apocalyptic assaults. The hammers have been present for many major battles during the imperium's history from the decades proceeding the age of apostasy in the early 36th millennium and onward.

History
Forged within the twelfth founding of the Adeptus Astartes and given their full chapter fleet the chapter immediately set about adapting the codex's tactics to suit their needs to a more adaptable extent than most of their successor brethren but once again geared more towards siege engagements. After the 12th founding, the Hammers went on to multiple battles over the millennium from the age of apostasy to the age of the 41st millennium although not much has been cataloged due to the sheer amount of collateral damage they accidentally cause. In generalist terms

The Battle of Heavens Gate Mountains
The Battle of Heavens Gate was a horrifically bloody and violent assault up into a frigid mountain range with swirling shards of ice moving at hundreds of miles an hour and unsteady terrain however the Chapter Master at the time Fredrick Hypax instated in the following decades of the age of apostasy ordered his

of their exploits which is fine by them because of the sheer collateral damage they accidentally cause.