The Nevada-class heavy frigate is a heavy general-purpose escort and combat vessel that was utilised by the UNSC Navy in the immediate aftermath of the Human-Covenant War. One of dozens of new designs created during and after the war to phase out the UNSC's battered fleet of frigates and destroyers, the Nevada is the largest and most powerful frigate ever built by the UNSC. It represents a considerable shift from the previous SinoViet Heavy Machinery design philosophy, trading cost-efficiency and some adaptability for superior combat capabilities and more advanced technologies. Despite this, the Nevada still retains the traditional shape of its predecessors, and can still be counted on as a reliable 'jack of all trades' frigate.

The Nevada-class was introduced in 2550, with its development accelerated after the Fall of Paris IV. Being a test-bed for a number of experimental technologies, the Nevada saw limited service as its complicated frame and untested subsystems saw questions arise about its reliability. Despite participating in a small number of battles in the years before, the Nevada only saw action in numbers during the Fall of Reach in which the class took heavy casualties. Despite this, the frigates' proven potential would see development continue until finally the class was approved for mass-production after the Battle for Earth. Hotly-competing with other next-generation escorts, the Nevada would fulfil a valuable niche as a heavily-armed long-range patrol ship. Disregarding unforeseen circumstances, these frigates are expected to serve for many decades during humanity's most vulnerable hour.

UNSC El Salavdor
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UNSC Nevada
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UNSC Goliath
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UNSC Atlas
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UNSC New Phoenix

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UNSC Plateau

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UNSC Niflheimr

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UNSC Trepediation