Imperial Forces of Innsmouth Sector

Due to its close proximity to the Imperium-Tau border and ongoing incursions from Chaos and Ork forces, Innsmouth Sector is home to a substantial deployment of Imperial military assets.

Planetary Defence Forces
Like all Imperial regions of space, the planets of Innsmouth Sector maintain their own Planetary Defence Force (PDF) assets as the first lines of defence against enemy incursions. Some of these forces are naturally larger than others, and as such it is not uncommon to find PDF from one of the densely-inhabited hive worlds of Innsmouth Sector also serving on neighbouring planets with smaller populations.

Below is a list of PDF organisations that comprise the bulk of Innsmouth Sector's military capabilities in this category:
 * Hive World Innsmouth PDF

Astra Militarum
The Astra Militarum maintains a heavy presence in Innsmouth Sector, with military assets spread across all sub-sectors of the region. The Astra Militarum primarily concerns itself with the threat of the Tau Empire, although it has also seen action against the Ork pirates and Chaos raiders that plague Innsmouth Sector. In late M41, the Astra Militarum played a large role in the fight against Waaagh! Urtsmog.

Below is a list of the main Astra Militarum detachments within Innsmouth Sector:
 * Voltarian 5th/7th "Cotterz' Killers"
 * Innsmouth Imperial Guard Regiments

Adeptus Astartes
As a result of historical precedent and current events, several Astartes chapters have garrisons within Innsmouth Sector. Together, they guard the citizens of the Imperium from the myriad of threats at the fringes of the Ultima Segmentum that are too much for the Astra Militarum to handle.
 * Disciples of Dorn
 * Blood Angels

Imperial Fleet
The assets of the Imperial Fleet within Innsmouth Sector are organised within the framework of Fleet Ultima, the High Command of which is based at the Kar Duniash naval base. The fleet's duty within Innsmouth Sector is to defend Imperial assets, convey merchant tonnage, and provide transport for the billions who call the sector home.
 * Battlefleet Innsmouth - The sectoral-level organisation of the Imperial Navy in Innsmouth Sector. Battlefleet Command is located in orbit around Hive World Innsmouth on the Ramilies-class Starfort Admiral Philips. Within the Battlefleet there are 4 permanent sub-divisions:
 * Innsmouth Sub-Sector Flotilla
 * Pauldron Sub-Sector Flotilla
 * Imperius Sub-Sector Flotilla
 * Ollanius Sub-Sector Flotilla
 * Merchant Fleet Innsmouth - The sectoral-level organisation of the Merchant Fleet component of the Imperial Fleet.