The phrase "as additional forces" is correct and usable in written English.
It can be used when referring to extra personnel or resources that are being added to a situation or operation.
Example: "The military deployed troops to the region, as additional forces were needed to ensure security."
Alternatives: "as extra units" or "as supplementary troops".
In addition to the photon, three field quanta were also predicted as additional force carriers the W particle, the Z particle, and the Higgs boson.
Newton also enabled us -- through his development of mechanics -- to account for as many additional forces as we like, including air resistance, since the F in F = ma is actually the sum of all the relevant forces on a system.
The main idea of the approach is that the mesh nodes are considered as similarly charged interacting particles which move within the region to be meshed under the influence of internal (such as particle particle interaction forces) and external forces as well as optional additional forces.
It must also be stable against perturbations such as the additional forces that might be imposed, for example, by winds or by earthquakes.
A growing number of insurgents have relocated here and other places in northern Iraq as the additional forces sent by President Bush have mounted operations in the Iraqi capital and American commanders have made common cause with Sunni tribes in the western part of the country.
The President's commitment is to rapidly send these additional forces forward to get as much force into the fight as fast as General McChrystal can absorb it.
This defect was stabilized with an osteosynthesis plate and physiological hip reaction forces as well as additional muscle forces were implemented to the femoral bone.
India, Turkey and Pakistan have been regarded by the Pentagon as potential contributors of additional forces.
The most optimistic course of events would still leave 120,000 to 130,000 American troops in Iraq, down from the peak of 170,000 late last year after Mr. Bush ordered what became known as the "surge" of additional forces.
As a consequence, these additional forces are neglected and problems may arise when trying to assess dynamic movements or static forces applied in the horizontal plane.
