The Earth Reclamation Force was comprised of divisions of the Robotech Expeditionary Force charged with liberating Earth from Invid control.
The 1st Reclamation Force of 2038 and the 2nd Reclamation Force of 2042 were both destroyed and failed to achieve their objective. The 3rd Reclamation Force of 2044 succeeded in its mission only after the launch of its Neutron-S missiles led to the sudden departure of the Invid from Earth.
The SDF-4 leads the 3rd Reclamation Force against the Invid in 2044.