Government’s special research
For those, who always wondered if the President tried to enhance his soldiers.
One day, the President, our beloved dwarf-sized, murderous Pandak Panay got an idea. He wanted to try his special genetical research, and intended to do the tests on his lesser government troops. So he got some squads called in, told them they are going to be enhanced and ordered them to undergo the test.
After a few applications, the soldiers started to gain in size and strenght and in few days, they were three-times bigger than their smaller versions. It has a downside, however. The soldiers' heads did not gain same size, instead, they ended up in the chests of the poor guys, so they look like headless colossus abominations.
Drop it in the dropzone and enjoy killing big guys(Literally)