Astra Militarum - Operations: The Guardsmen of the infantry form the foundation of the Imperial Guard's structure. However, it is uncommon for regiments to despatch formations made entirely out of Guardsmen without attaching auxiliaries or support elements. In the chain of command, for example, an Imperial Guard officer, often a Colonel or a General, will find himself accompanied by Imperial Sanctioned Psykers drawn from the Adeptus Astra Telepathica's Scholastica Psykana facilities, or officers of the Imperial Navy to relay co-ordinates to harass enemy deployments and conduct interception attempts.The Imperial Guard is able to draw upon a not inconsiderable number of specialized troops and sub-human and Abhuman auxiliaries. These may include the Storm Trooper Regiments of more disciplined origins, drawn from the Schola Progenium facilities on many Imperial worlds. The Guard can call upon Abhuman Ogryns from Feral Worlds whose brutish strength may be used in order to make up for the Guardsmen's lack of close combat endurance, or Ratling snipers whose small size and nimbleness allows them to infiltrate behind enemy lines where they can wreak havoc with their natural talents behind the telescopic sights of their needle rifles.Though the Imperial Guard has enough men and firepower to throw up a withering wall of laser bolts, most opponents that close the distance with the Guard's lines find themselves at a major advantage in close combat, which more often than not results in a bloodbath as the Guardsmen find themselves outmatched in melee and slaughtered.Different types of Imperial Guard Regiments utilize different methods of warfare. Though most of their engagements would count as battles of attrition, often Imperial Guard units will work alongside auxiliaries or specialized units in order to achieve different tactical outcomes some which may include, sabotage, infiltration, demolitions.The Imperial Guard is the stalwart primary fighting force of the Imperium of Man, capable of dispensing a myriad of specialized troops. The Imperial Guard's most prominent asset is its ability to draw upon endless ranks of Guardsman -- drawn from various human-settled worlds. Each Imperial world supplies an annual tithe of Guardsmen, often accompanied by quotas of las-gun production and armoured vehicles in order to sustain the never-ending war machine that is the Imperial Guard.The hierarchy of command and the formations of local Planetary Defence Forces (PDF) may differ from world to world. On some worlds, a PDF may be composed of hiver gangs or other irregular troops or it may be an official, professional army making use of proper military organisation and equipment. In the Imperial Guard, there is only one primary tactical and strategic formation -- the Regiment. The Regiment provides a solid command structure that allows for both versatility and lethality when the application of force is needed in any Imperial warzone. Guardsmen form the bulk of many Imperial Regiments, however it is common for Regiments to exclusively include the support drawn from other Regiments in order to sustain operations. The nature of the Regiment alone is one that requires the support of many other Imperial assets. Infantry Regiments consist mainly of Infantry Squads and Conscript Militia. However, Armoured Regiments may include Armoured Fighting Vehicles and Support Tanks with little to no Infantry, or may only include Guardsmen in mechanized formations, known as Armoured Fist squads, where a single Infantry Squad is attached to a dedicated armoured transport, likely a Salamander or Chimera Armoured Personnel Carrier or its equivalent. Thus, most regiments' Armored Fist squads that are borrowed from other regiments as infantry regiments may have no Chimera APC's. Others may be drop troops trained to drop onto a battlefield using drop ships or Drop Pod-like vehicles or they may have Valkyries attached to them for drop troop insertion. The regiments are mixed once the Imperial Navy's transport vessels picks up all the regiments or brings them to their destination so that tank regiments cannot be outflanked by infantry while an infantry regiment will have an attached artillery battery to back it up.Imperial Guard regiments are drawn from all types of planets in the Imperium, from Terra itself to pre-industrial feral and feudal worlds, and the contributions of troops from certain planets like Cadia over the ten thousand years of the Imperium's existence run into the millions. The Imperial Guard is constantly at war, freeing worlds from the influence of aliens or the Ruinous Powers, or defending them from the same enemies. The Imperial Guard relies upon the Imperial Navy for transport to and from war zones. The regiments of Guardsmen are as diverse as the worlds they come from. Where the Space Marines might fight a war through tactics and efficiency, the Guard can easily afford to crush its opposition amidst thousands of lasgun volleys and hundreds of ordnance blasts. Such is the numerical superiority of the Imperial Guard that even Orks can sometimes find themselves outnumbered by the so-called "Sledgehammer" of the Imperium.Imperial Guard equipment and weaponry spans a wide range of common Imperial hand-held weaponry, from the standard-issue Lasgun to the high-powered Hellgun and Hot-Shot Lasgun for Storm Troopers. Likewise, the Imperial Guard soldiers can also range in quality from Cadian Guardsmen who are trained to kill from childhood, to ordinary Imperial citizens dragged from their homes and stores, handed a Lasrifle and Flak Armour and conscripted into the Guard. However, all Guardsmen will be given intensive training, if not on their homeworld then in transit to their first war zone. They are taught how to shoot and use special and heavy weapons effectively for weeks before they are sent into combat, and braced for the inevitable shock of being on a foreign and sometimes alien world. A Guardsman who spent his youth on a hive world will probably never have seen the open sky before, while a savage Guardsman from a feral world will have never seen a city or factory or a motorized vehicle before he joined the Guard.