The Perseus is a large gunship manufactured by Roberts Space Industries (RSI). First developed in 2528 for the United Planets of Earth Navy (UPEN), it was used in blockades and security patrols, most notably the Incident at Red Ridge in 2529. It became a mainstay along the former Perry Line after Xi'an-Human First Contact in 2530. In 2863, it was retired from production at RSI. In 2946, Admiral Ernst Bishop witnessed an aging Perseus participate in Operation Mandrake and requested that an updated Perseus-class fleet be put into production. After the creation of the Militia Mobilization Initiative, RSI expanded development to include a civilian version. The new Perseus, equipped with modernized weapons and a redesigned lower deck, was released in 2950.