Currently there is only one Czechoslovakian tank line in World of Tanks and it consists of 3 light tanks beginning with the tier 1 Kolohousenka and 7 medium tanks ending with the tier 10 TVP T50/51. The general characteristics of this Czechoslovakian tank line are very poor durability both armor/HP wise and in return most of the tanks have extremely good top guns in regards to damage per minute. Most Czechoslovakian lights/mediums lack high penetration once past the lower tiers and rely upon dealing damage quickly before being focused on due to their low durability.
Medium Tank Line (Kolohousenka -> TVP T50/51)
Starting at tier 1 you have the light tank Kolohousenka which will introduce you to the Czechoslovakian light/medium line. Being a tier 1 you will only play this tank for a handful of battles before being capable of moving onto the tier 2 LT vz. 35. The Kolohousenka has poor armor even for a tier 1 with 14mm/8mm/6mm values on its hull and 14mm across the turret. It also has very poor speed limits of 25 km/h forward and 8 km/h reverse. The Kolohousenka is so under-powered with its 50 horsepower engine that even hitting 25 km/h while going forward is difficult unless going downhill. On the positive side the Kolohousenka only has one module capable of being researched(the top 47mm gun) and this 47mm gun gives it the most damage at tier 1 with AP(50 dmg) and very good penetration at this tier. It is most comparable to the MS-1 which it beats out damage per shot wise(50 vs 40), in accuracy (0.42 vs 0.46) and in aiming time (1.9 vs 2.5). Overall the Kolohousenka is a difficult tank to do well in due to its lack of armor and low mobility at tier 1 since most of the tanks you face are very mobile. On the other hand when you make it to the fight you have the hardest hitting gun at tier 1 and you will also cruise through this tank in a handful of matches.
At tier 2 the LT vz. 35 improves upon the Kolohousenka but doesn’t change the characteristics of the way it plays very much due to poor durability, low mobility, and an above average gun. The LT vz. 35 only has available to it two 37mm guns with the top gun improving the reload time and accuracy parameters. Like the previous tank the LT vz. 35 has a weak engine with only 135 horsepower when upgraded and due to this its mobility is lacking compared to the majority of other tier 2 tanks. On the plus side the LT vz. 35 does have 180 health points which puts it towards the top at tier 2 and very good penetration on both of its non high-explosive shells. It also is very accurate for a tier 2 tank with a 0.38 value and its aiming time of 1.7 seconds is also near the top of the tier 2 tanks. Unfortunately the LT vz. 35 has the same fate of the Kolohousenka in that the lack of armor and mobility is to much to make up for its excellent firepower. With tier 2 matches largely consisting of very mobile small tanks it makes it difficult to play a slow unarmored tank at this tier.
The tier 3 LT vz. 38 like the previous two tanks is very frail with 25mm/15mm/15mm values on the hull and the upgraded turret only providing 50mm/30mm/25mm values. Unlike the previous two Czechoslovakian tanks the LT vz. 38 finally gains a bit of mobility once the top 140 horsepower engine is installed which allows it to reach its 42 km/h top speed on level terrain unless you are turning frequently. Compared to many other tier 3 light tanks the LT vz. 38 is still lacking mobility but it gains enough with the upgraded engine to remove it from being considered a downside. Starting out the LT vz. 38 does lack a good gun until you equip the top 37mm Škoda A23 which has a 3 round magazine. The top guns gives this tank a decent 120 damage burst over 3 seconds, a quick 5 second reload between magazines, once again great penetration of 82mm(AP)/115mm(APCR), and great accuracy(0.38)/aiming time(1.7 seconds). Due to the improvements to its mobility over its predecessors the LT vz. 38 can now effectively use its firepower/mobility combination to deal damage to almost every tank it sees frontally from a safe distance and to maneuver around the map with relative ease.
Moving onto the tier 4 ST vz. 39 medium tank you leave the light tank part of this branch behind and surprisingly move into a tank smaller than many tanks tier 1-3. Transitioning to a medium tank means you lose the camouflage bonus light tanks receive while moving but the small size of the ST vz. 39 makes up for this change. Durability is still a major concern since your armor is still very poor on the hull and the upgraded turret is only 60mm across the front. Although the armor is weak the small size when combined with the above average gun depression does make the ST vz. 39 very hard to hit at range when hull-down. While your mobility improves compared to the LT vz. 38 it still feels somewhat sluggish for the size of your tank and does make it difficult to avoid being caught in bad situations by the plethora of fast tanks from tier 3-5. Unfortunately the ST vz. 39’s firepower does not hold up against the tier 5 and tier 6 tanks it regularly faces due to it only having 47mm options. The upgraded 47mm Škoda A11 is the only viable gun and with a paltry 60 damage and terrible damage per minute it is very difficult to rack up damage in this tank. The ST vz. 39 does have good accuracy(0.36), a decent 2 second aiming time, and retains good penetration values. Overall the ST vz. 39 is a very difficult tank to play due to the lack of firepower and due to it being transitioned from a light tank to a medium tank. Its small size and passable mobility would work well if it was a light tank but without the light tank camouflage bonus the lack of firepower makes this a difficult tank to grind through.
Continuing the trend of improving upon the previous tank without changing much the tier 5 Škoda T 24 medium tank doesn’t feel like a huge change coming from the ST vz. 39 at tier 4. The Škoda T 24 is a brutally hard stock grind until you get it fully upgraded and even then the issues that plagued the ST vz. 39 are still apparent with the Škoda T 24. Firepower wise the Škoda T 24 only have two 75mm gun options with the upgraded gun improving penetration, rate of fire, accuracy, and aiming time. The 75mm does 110 damage per shot which is decent(but not great) at tier 5 and its penetration values of 132mm/185mm/38mm are excellent for a tier 5 medium. However, the rate of fire being 11.32 gives the Škoda T 24 almost the lowest DPM value of tier 5 mediums. Fortunately the Škoda T 24 is one of the most mobile tier 5 medium tanks when not turning and it has a high 58 km/h top speed going forward. At this point you can guess that the armor values for both the hull and turret are well below average on the Škoda T 24. The above average -10 degrees of gun depression does make up for the lack of armor somewhat but it still doesn’t elevate the Škoda T 24’s lack of of firepower enough to make it an enjoyable tier 5 medium tank to play.
At tier 6 the Škoda T 25 medium tank sees significant improvements over the Škoda T 24 to make it a decent tier 6 medium tank. The stock grind is still worse than your typical tank since you start out with a non-autoloading 75mm gun and a 450 horsepower engine. Once fully upgrade though you have a zippy tank that can hit its 60 km/h top speed regularly but is held back by its abysmal 25 degree traverse speed making it feel like you are turning through 5 feet of mud. Keeping with the previous Czechoslovakian tanks the hull and turret armor are both very poorly protected. Combined with the poor armor is the height of the Škoda T 25 which is much higher than other mediums making it difficult to hide behind smaller cover and also making the tank easier to hit. Fortunately the Škoda T 25 retains the excellent -10 degrees of gun depression which makes it capable of hiding most of the tank behind hills. The main feature of this tank is the top auto-loading 75mm gun that has a 3 round magazine firing 110 damage shells every 1.33 seconds. The accuracy is a tad bit low at 0.38, aiming time of 2.1 seconds is average, and the penetration values unfortunately do not improve coming from tier 5. 132mm(AP) is difficult to use against many tier 6 and higher tanks and the premium rounds(185mm) can be very expensive to run. For a tier 6 medium the Škoda T 25 is competitive once upgraded since you have great mobility(in straight lines) and an excellent gun that allows you to get a few quick shots off before retreating. It is very important however to avoid direct conflicts due to the low durability and poor traverse speeds.
Tier 7 shakes the Czechoslovakian light/medium line up drastically with the Konštrukta T-34/100 since its characteristics are opposite of the other tanks in this branch. The Konštrukta T-34/100 ditches mobility, penetration, accuracy, and a lighter hitting gun in favor of a larger top 100mm gun that is tied with the T-34-1 as the hardest hitting tier 7 medium tank. The T-34-1 and Konštrukta T-34/100 are statistically very similar but at the same time perform very differently. The Konštrukta T-34/100’s 100mm does 250 damage which at tier 7 outside of the T-34-1 only the T20 and VK 30.02 (D) come close. Its AP round has 175mm penetration which is only beat by the Panther for mediums and its 250mm HEAT round is best out of tier 7 mediums. Damage per minute is only better than the T20 and T-34-1 with a base value of 1,764 DPM(152 more than the T-34-1) and its accuracy is poor at 0.38 with a 2.4 second aiming time. Unlike other Czechoslovakian tanks the Konštrukta T-34/100 is very sluggish and won’t be zipping around the map(only the Chi-Ri is slower). Where the Konštrukta T-34/100 differs the most from the T-34-1 is that its armor is terrible on both the hull/turret, whereas the T-34-1 has phenomenal armor for a tier 7 medium. Although the Konštrukta T-34/100 is the “black sheep” of this line since it differs so much from the other tanks(slow and only -5 degrees of gun depression) once you pass the brutal stock grind it is an above average tier 7 medium. It does its job well if you are able to avoid directly conflicts or if you are caught outnumbered since your armor won’t do you any favors.
Moving back towards how other Czechoslovakian tanks play(but not completely) is the tier 8 TVP VTU Koncept which is a massive tier 8 medium tank size wise. The TVP VTU Koncept unlike other tanks in this line has several gun options and 3 potential top configurations. But first lets look at the general characteristics of the TVP VTU Koncept before diving into that topic. The TVP VTU Koncept is very large for a medium tank and its hull/turret armor is well below average. This is a huge negative factor to the tank since it makes it extremely hard to not die early on if you are spotted. While the TVP VTU Koncept has an excellent power to weight ratio, with one of its top configurations beating the T-44, it still feels sluggish due to its top 50 km/h speed, size, and terrain resistance. The top engine does make a significant improvement to the mobility and does make it feel more like a medium tank compared to the first two engines so equipping it is a large benefit to the tank. The view range is also decent at 370m for the stock turret and 380m for the upgraded turret. Its HP is also near the top for tier 8 mediums at 1,350 with the stock turret and 1,450 with the upgraded turret.
Moving onto the TVP VTU Koncept’s gun options is where you are faced with a few choices that drastically change how the tank performs. One option is using the top turret with the 10.5 cm top gun that gives you excellent 320 damage shells at the cost of a little penetration, a lot of DPM, only -6 gun depression, and a ton of accuracy. For those who want to play the TVP VTU Koncept as an armor-less heavy tank the 10.5 cm is better and peek-a-booming than the top 8.8 cm gun. However, you limit yourself in any other situation. Option 2 is using the top turret along with the top 8.8 cm gun which is what most players will most likely end up using. The top turret provides +10m view range, +100 HP, and the 8.8 cm has the second highest DPM for tier 8 mediums with the top turret. Penetration is also decent at tier 8 albeit the premium round is lacking penetration and the overall accuracy of 0.37 is passable. With the top turret you are still stuck with -6 degrees gun depression like with the 10.5 cm. Option 3 is to stick with the stock turret and still equip the top 8.8 cm gun. Doing this you lose about 100 DPM, 10m view range, and 100 HP but gain -2 degress of gun depression bringing it to -8 overall. This bonus is a trade off but does allow the TVP VTU Koncept to hull-down to cover most of its massive size and does provide more tactical options. In the end the TVP VTU Koncept is a mediocre tier 8 medium tank since while it does have decent top gun options its massive size, lack of armor, and somewhat poor mobility hold it back.
Tier 9 sees the Škoda T 50 return to lightly armored/highly mobile tank that you experience prior to tier 7/8 in the Czechoslovakian line. The Škoda T 50’s main claim to fame is the top 100mm AK1 gun that features a 3 round magazine with each round doing 320 damage. The burst of 960 damage gives it less damage per magazine than the Lorraine and T54E1 but allows to unload its shells faster with a short reload between shells in a magazine. It also has a decent reload between magazines and its DPM is less fickle than other auto-loaders due to the shorter reload between magazines. The Škoda T 50 has the best mobility out of tier 9 mediums and is extremely agile with only the Lorraine coming close to it. Like other Czechoslovakian tanks the Škoda T 50 has poor armor across the tank aside from the angled parts of its turret that is capable of deflecting poorly aimed shots. With a gun depression value of -8 degrees the Škoda T 50 can make up for the lack of armor by using a map’s terrain to its advantage like most other Czechoslovakian tanks(barring the tier 7/8). The 0.35 accuracy and 2.2 second aiming time is excellent for an auto-loader but the 248mm penetration is somewhat lacking compared to other newer tier 9 mediums. With the combination of burst firepower and mobility the Škoda T 50 is a deadly tier 9 medium capable of doing well in most situations outside of any that forces it to take a lot of rounds its way.
At the end of this Czechoslovakian branch is the tier 10 medium tank TVP T 50/51. The TVP T 50/51 is very similar to the tier 9 medium before it with several slight improvements but both play very similar. Like the tier 9 the TVP T 50/51 has the 100mm AK1 auto-loading gun but now instead of a 3 round magazine it has 4 rounds giving it a larger burst strike. With a 1,280 damage burst strike and a very short reload between magazines the TVP T 50/51 has an impressive amount of firepower for a tier 10 medium tank. While it doesn’t do as much damage in a magazine as some other auto-loaders it is able to get its 4 rounds off almost instantaneously. It also has a shorter reload between magazines which lets it stay closer to the front lines than other auto-loaders. Outside of the Bat.-Chatillon 25 t the TVP T 50/51 has the best mobility of tier 10 mediums and is very easy to maneuver around the battlefield. Like the tier 9 the TVP T 50/51 also has poor armor across the entire tank except for parts of the frontal turret that can provide some protection. The same -8 degrees of gun depression remains which helps the TVP T 50/51 cover some of its height behind hilly terrain. Overall the TVP T 50/51 is the definite example of speed/burst damage currently in World of Tanks for mediums. It is most comparable to if a Leopard 1 and a Bat.-Chatillon 25 t were combined.