Phantine Air Corp
The lack of open ground on Phantine meant that, when the time came for an Imperial Guard tithe, no ordinary regiments could be mustered. Imperial High Command made a special exception for the Phantine to be allowed to operate their own atmospheric fighter craft, despite the rule that no Imperial Guard regiment may provide its own air cover. The odd role of the Phantine means that they are not welcome among either regular Imperial Guard or Imperial Navyaviators, amongst whom they are forced to operate. However the Phantine has proven to be an extremely capable regiment and has begun to earn the grudging respect of navy fliers.
The Phantine Air Corps is formed up of Wings, which contain specific squadrons, usually all of one type of aircraft. Each individual squadron is made up of 12 aircraft. Squadrons are usually broken down further, into three formations of four fighters known for fighter patrols and the same again or two units of six for bomber sorties. These formations are called Flights.
Absorbed whole from the Phantine PDF, Umbra Squadron switched from Lightning to Thunderbolt fighters at their mustering into the Guard. Their members wear quilted taupe flightsuits, red helmets and brown leather jackets. Their assigned model of Thunderbolt is pattern I-XXI XX Wing 'Umbra' Squadron
Umbra Squadron fought in the liberations of Urdesh Minor and Enothis, incurring heavy casualties in the latter conflict. They also scored one of the highest squadron kill tallies in the theatre, and Umbra 8 was responsible for downing a feared enemy ace, Khrel Kas Obarkon.