Serpent main battle tank

The Serpent, officially the Gun Battle Crawler 3-Inch "Serpent" (Izeryker: Kanonstridkruper 3t «Slenkenz»), is an Izeryker. Designed from the outset with land war against Valkoria in mind, it is Izeryk's heaviest tank serving in the Duchal Armies Shock Ruitery Regiments and the Territorial Army Heavy Contingency Force. The Serpent improved on nearly every aspect from its predecessor, with more robust composite armor, an 111mm smoothbore gun capable of defeating modern armor in use by Valkoria, and a more efficient Elektic motor design that provides one of the world's longest operational ranges for a tank.

There are three main variants in service as of year 1242, the A, A1, and B. The Serpent A was the first production variant that saw widespread adoption, and is currently being upgraded to the Serpent A1 standard or phased out for the superior new production Serpent B. The Serpent A1 was developed as an expedient to counter the threat of prolific in the Valkorian military through the addition of  (ERA) and an upgraded composite armor layout, but still within the dimensions of the original cavity. The Serpent B meanwhile was a more comprehensive upgrade, with no ERA but a much greater amount of integral composite armor, improved fire control, the capability to fire newer rounds, a new engine, thermal sights, and a new fire control system. These newest variants began to be deployed in year 1237, 11 years after the first production variant, with about 22% of in-service Serpents being Serpent Bs as of year 1242. The Realm Guard's plan is for Serpent Bs to replace all Serpent As in Armored Stridkommando of the Duchal Armies (each with two Shock Ruitery Regiment) and the Territorial Army's Heavy Contingency Force while other Mechanized Stridkommando will have their Serpent As upgraded to Serpent A1s by year 1247.

Deployment
Duchal Armies (2,226)
 * Haukvirth Shock Ruiter Academy - 15× Serpent B, 45× Serpent A
 * Stridkommando «Rykhov»
 * 3° «The Empress's Hand» (Shock Ruitery) - 159× Serpent B
 * 10° «The Black Hats» (Shock Ruitery) - 159× Serpent B
 * Stridkommando «Nieusloz»
 * 10° «Princess Anita's Heavy Ruiters» (Shock Ruitery) - 212× Serpent A1
 * Stridkommando «Rykern»
 * 39° «The Realm Drakonists» (Shock Ruitery) - 159× Serpent A1
 * 70° «The Vineker Blacks» (Shock Ruitery) - 159× Serpent A
 * Stridkommando «Haukvirth»
 * 65° «The Haukvirth Grenadists» (Shock Ruitery) - 159× Serpent B
 * 46° «The Stavorik Shock Ruitery» (Shock Ruitery) - 159× Serpent A1/A
 * Stridkommando «Arensloz»
 * 14° «The Arensloz Black Hats» (Shock Ruitery) - 159× Serpent A
 * 18° «The Elektivouder Guards» (Shock Ruitery) - 159× Serpent A
 * Stridkommando «Zoervoud»
 * 20° «The Lasting Ruiters» (Shock Ruitery) - 212× Serpent A
 * Stridkommando «Alahaven»
 * 21° «The Nomads» (Shock Ruitery) - 212× Serpent A
 * Stridkommando «Kanaalvakt»
 * 22° «The Amphibian Crawlers» (Shock Ruitery) - 159× Serpent A
 * 91° «The Collegiate Riders» (Shock Ruitery) - 159× Serpent A

Territorial Army (528)
 * Heavy Contingency Force
 * 1° Regiment, Shock, Marine (1RSM) - 132× Serpent B
 * 2° Regiment, Shock, Marine (2RSM) - 132× Serpent A1
 * 3° Regiment, Shock, Marine (3RSM) - 132× Serpent A
 * 4° Regiment, Shock, Marine (4RSM) - 132× Serpent A

Variants and upgrades

 * Serpent A (1226): First production variant.
 * Serpent A1 (1236): Added explosive reactive armor to the turret and front hull, as well as new composite armor inserts.
 * Serpent B (1237): Comprehensive upgrade, with additional turret and hull armor, a new gun and enlarged bustle for fielding longer rounds, new fire control system, thermal sights for the gunner and commander, and upgraded engine.