UNSC Apollo-class Light Cruiser.
After the fall of the REACH shipyards, the UNSC Fleet was running low on ships. As a last resort, a fleet of 23 mothballed Apollo-class Light Cruisers were pressed into service to defend Earth and the Inner Colonies for the following months. Refitted for active duty similar to the older Halcyon-class Cruisers, the Apollo recieved additional battleplate to her poorly-defended bow. Her MACs have been upgraded with energy capture technology, allowing them to fire two rounds in quick sucession, similar to the new system aboard the refitted Halcyon, the Pillar of Autuumn. A secondary fusion reactor was added with advanced cooling systems to supplement the aging original reactor. Archer pods and Longsword fighters have also been added as secondary armament. The Apollos supplemented the home fleet's Marathons during the first and second battle of Earth.
UNSC Ranger-class Destroyer
Developed from the UNSC Frigate, the Ranger class boasted what most other UNSC Destroyer had, except for nearly three-quarters the cost. Due to a modular design, sharing many similar parts to the destroyers and frigates already in service, the Ranger-class was an engineer's dream. Boasting a destroyer-calibre MAC guns as well as oversized Archer pods, the ship could easily hold it's own in an engagement. Ranger-class ships were quickly rerouted to defend the Inner Colonies following the fall of the Reach Military Installation.