Sierraplata is a mountain range located in eastern Erusea, Usea.
During the Lighthouse War, Erusea utilised Sierraplata an IRBM base. As Osean forces freed over half of Usea, Erusea began to activate the base.
On September 2, 2019, the LRSSG deployed the Strider Squadron to assist multiple B-2bombers in destroying the silos. Using a targeting pod, they allowed the B-2s to eliminate the silos. Following their destruction, multiple IRBMs were launched, all of which were shot down by Strider Squadron.