The Helghast Third Army, or the Third Shock Army, under the command of General Joseph Lente, was probably the most well-armed unit of all the Helghast forces during the Second Extrasolar War. They used vehicles such as light and heavy hover tanks, along with APCs. Also their standard issue weapon, the StA-52 Assault Rifle had an underbarrel shotgun attachment, which has never been used by any of the other armies. They were also the unit responsible for the executions of the Helghast whom questioned Scolar Visari.
However, even with their vast numbers, inside information on ISA forces, and equipment, Jan Templar and his squad with the use of asymetric warfare and counter intellegence were more than a match for the men of the Third Army. With the death of Lente at the hands of Colonel Gregor Hakha, the unit came under the command of General Metrac, who managed to regain the initiative in the south of Vekta before being pushed back and, ultimately, killed. In the end, most of the troops from the Third Army were annihilated, taken prisoner, or were the lucky few to escape back to Helghan.
The size of the Third Army was about 300,000 in the beginning of the invasion on Vekta. The ISA resistance drained these numbers more than the Helghast expected early on. Later the Helghast Command decided to use non-helghast, to boost the strengh of their ground forces. But these reinforcements consisted only of several hundreds of Mercenaries and some ten thousand irregular vektan sympathizer. In the end, most of them were sacrificed by the Helghast in hopeless operations against the ISA.
- The Third Army was classified as the Third Shock Army by Colonel Mal Himeon in a feature article on the Killzone website, further drawing influence from World War Two.
- It is speculated that the Helghan Third Army is an allegory to the 6th Army of World War Two. The Sixth Army was the most highly decorated German army unit until the Battle of Stalingrad, which also parallels the Invasion of Vekta. Both armies met similar fates in that they gained great success initially, but were bogged down by a determined enemy who eventually besieged and defeated them.
- It was also the name of the US Army formation led by General George S. Patton that played a huge role in the defeat and later occupation of Germany during WW2.
- They were also commonly known as the Filibots, due to their resemblance of the once speculated teacher, Phillip Mander.
- There may also be a resembelance to the Russian 3rd Shock Army, of which their hatred towards Nazi Germany is the same as the Helghan's hatred for the ISA.
- The Third Army was arguably the most well funded part of the Helghast military, they were for example equipped with high-tech hovertanks and superior weapons to the other Helghan armies