The Rhino is the most widely used armoured personnel carrier in the Imperium. Based on ancient STC technology, the fundamental design is robust, reliable, and easy to maintain, with an adaptive power plant that can run off a wide variety of fuels, making it perfect for the wide-ranging armies of the Great Crusade – and the wars of the Horus Heresy. As such, the Rhino chassis serves as a basis for many other war machines, and these transports are produced in their thousands – several distinct patterns are in common use throughout the galaxy, with the heavily-armed Deimos being the most widespread amongst the Space Marine Legions.