Planetary Defence Forces (PDF for short, also known as Planetary Defence Militia, Planetary Militia or Planetary Guard) is a term referring to the primary military defence forces of an Imperial world.

行星防御部队（简称PDF，也称为行星防御民兵、行星民兵或行星卫队）是指帝国世界的主要军事防御力量。

Organisation 组织

The PDF is under the control of the local government rather than direct Imperial control: the raising, training, arming, leadership, etc, is entirely in the hands of the Imperial Governor. All Imperial planets in general are required to maintain a standing army in order to maintain government (and thus Imperial) control over the planet against any possible invasion or insurrection.

行星防御部队由地方政府控制，而不是由帝国直接控制：供应、训练、武装、领导等完全掌握在帝国总督手中。一般来说，所有帝国行星都需要维持一支常备军，以维持政府（以及帝国）对行星的控制，防止任何可能的入侵或叛乱。

In response to any threat, the PDF has the responsibility to engage the enemy until Imperial reinforcements can be mustered from the nearby sector. Thus although rarely respected due to their inherent lack of experience, PDF are widely considered crucial to the Departmento Munitorum as the first line of defence for Imperial worlds against Xenos invasion and Chaos-inspired rebellion.

为了应对任何威胁，行星防御部队有责任与敌人交战，直到从附近地区召集帝国增援部队。因此，尽管由于缺乏经验而很少受到尊重，但PDF被广泛认为对军务部至关重要，是帝国世界抵御异型入侵和混沌叛乱的第一道防线。

Just as significant is the PDFs' role as the main source of recruits for the Imperial Guard. Whenever required, the best soldiers in a PDF are transferred into the Imperial Guard, receiving further training as they are shipped to their destined location elsewhere in the galaxy. Typically one tenth of the PDF's personnel are given to the Guard, and these are usually the best soldiers as the penalty for a Governor for giving sub-standard soldiers is death. Those who are even more valuable are often formed into Kill Squads, trained and equipped like Storm Troopers.

同样重要的是，PDF作为帝国卫队新兵的主要来源。无论何时需要，PDF中最好的士兵都会被转移到帝国卫队，在被运送到银河系其他地方的目的地时接受进一步的训练。通常，行星防御部队十分之一的人员被派往卫队，这些人通常是最好的士兵，因为总督派不合格士兵的惩罚是死刑。那些更有价值的人通常会组成杀戮小队，像风暴兵一样训练和装备。

Many PDF forces base their appearance and equipment off of the venerated Cadian regiments. Others base themselves off the appearance of other notable regiments, such as the Tallarn, Mordians and Valhallans, often motivated by similar climates or even due to assistance from those regiments during the founding of the PDF. Still, given the unique and underlying culture of many worlds, PDFs and by extension their Imperial Guard regiments are armed and appear as their world can best equip them, a sign of the diverse cultures that constitute the Imperium as a whole.

许多行星防御部队的外观和装备都以受人尊敬的卡迪亚兵团为基础。其他人则以其他著名兵团的外观为基础，如塔兰、莫迪安和瓦尔哈拉，他们的动机往往是类似的气候，甚至是在PDF成立期间得到这些兵团的帮助。尽管如此，鉴于许多世界的独特和潜在文化，PDF以及他们延伸的帝国卫队兵团都被武装，并以他们的世界最能装备他们的方式出现，这是构成整个帝国的多元文化的标志。

Loyalties 忠诚

Although the PDF defaults all command to any Imperial forces that arrive, there are many possible reasons the PDF or elements of it may join in rebellion against Imperial authority; Chaos or alien (particularly Genestealer) infiltration of the planet, the ambitions of corrupt Planetary Governors and other organisations in charge of the planet, can mean the PDF turns against the off-world Imperial forces. This is a cause of mistrust for PDF in general, and further reason for commanders to prefer to rely on non-local defences.Inquisitors are particularly known for a lack of trust for the local PDF, often quick to have nearby Imperial forces available should need call for it.

尽管PDF默认所有命令都由到达的任何帝国军队执行，但PDF或其成员可能加入反抗帝国权威的叛乱有很多可能的原因；混沌或异型（尤其是基因窃取者）渗透到这个行星，腐化的行星总督和其他负责这个行星的组织的野心，可能意味着PDF会对抗世界外的帝国部队。这是对行星防御部队普遍不信任的原因，也是指挥官更倾向于依赖非本地防御的进一步原因。审判官尤其以对当地行星防御部队缺乏信任而闻名，如果需要，他们通常会很快找到附近的帝国军队。

System Defence Forces 星系防御部队

Many Imperial planets also maintain small independent space fleets, known as System Defence Forces (or SDF), performing similar duties to the Imperial Navy, albeit on a smaller and less well-equipped scale. The SDF may make use of System Defence Boats, lighter warships incapable of Warp travel.

许多帝国行星还拥有小型独立的太空舰队，称为星系防御部队（SDF），执行与帝国海军类似的任务，尽管规模较小，装备较差。SDF可能会使用星系防御舰，即无法进行亚空间航行的轻型战舰。

Notable Planetary Defence Forces 著名行星防御部队

• Agripinaa Home Guard 阿格里皮娜家园守卫

• Armageddon Defense Force 阿玛吉多顿防御部队

• Baran Siege Masters 巴兰攻城大师

• Cadian Interior Guard 卡迪亚内地守卫

• Erebus Defence Legion 埃里伯斯防御军团

• Kaerls 芬里斯近卫

• Maccabian Militia 马克贝恩民兵

• Rynnsguard 林恩守卫

• Ultramar Auxilia 奥特拉玛辅助军

• Vervun Primary 维尔文主军