FMB 46M Tjván

'''Strojní Zařízení Břetislav, Střední Tank Vz. 46 (Inventory designation: Střední Tank, Vz. 46''').

Combat use
The ST Vz. 46, ST Vz. 46. A and ST Vz. 46. B all saw service in the Great Kesh War on both sides of the conflict due to pre-war tank sales and captured vehicles. At the time of its service the vehicle was deemed an extremely competent vehicle and popularising it for decades after. Combat reports from the Great Kesh War showed that the primary armament of the ST Vz. 46. A (Gustav Ocelárny, 90mm Tk Vz. 48 L/55) had significant range and power advantages over the 76mm guns which were common amongst the nations of Kesh, and its armour had made the vehicle practically impenetrable to Tiperyn's 3-inch (76mm) rifled cannons from the frontal arc.

Variants
The ST Vz.46 saw many variants and upgrades due to its long service life around the world. The Modrovian official upgrades and variants for the vehicle were:
 * Strojní Zařízení Břetislav, Střední Tank Vz. 46(1946) - Stopgap production model, still featuring a hull model, and an older high power 75mm gun. This version featured an older engine which was prone to fires and had low range, it also featured thinner armour in a bid to lower the weight as a means to achieve minimum mobility requirements. This model was released due to delays to the development of key systems in the vehicle.
 * Strojní Zařízení Břetislav, Střední Tank Vz. 46. A(1948) - The original planned production model, featured the engine which was intended to be added and 90mm gun originally intended to be mounted on the vehicle, it featured 35mm of additonal armour plating to the frontal arc, and an additional 20mm on the side armour plates..
 * Strojní Zařízení Břetislav, Střední Tank Vz. 46. B(1952) - Featured a new engine upgrade as well as the introduction of infrared lamps for night operations. The cupola also received a machine-gun mount due to requests from Modrovian and foreign tank commanders alike.
 * Strojní Zařízení Břetislav, Střední Tank Vz. 46. C(1955) - Featured a new 105mm gun with centre aligned bore evacuator, as well as the addition of 55mm of armour to the frontal arc of the turret, and 30mm of armour to the upper glacis, as well as an additional 10mm to the weakest portions of the tank. Featured an effective single plane vertical stabiliser, also updated the IR lamp to a more effective model, as well as a new smoke dispensers.
 * Strojní Zařízení Břetislav, Střední Tank Vz. 46. D(1968) - Featured the addition of a new fire control system with automatic lead prediction and passive thermal imaging removing the need for IR lamps. Utilised a domestic Modrovian laser range finder. Featured a two plane, vertical and horizontal stabiliser. Mounts for ERA and composite add-ons were available.

Current Users

 * Kodeshia -
 * South Veikaia -
 * SiWallqanqa -
 * Pukara -
 * Republika Akhalia -
 * Kartvelian Tributary State -
 * Slivensk Republic -

Former Users

 * Modrovia -
 * Gardarike -
 * Veikan Kingdom -
 * Legantus -
 * Mero-Curgovina -