Why not add the T-84-120 “Yatagan” to War Thunder—either in a Turkish sub-tree for the USA as an import vehicle, or in the USSR tree as a standalone tank alongside the T-80U/T-80BVM—with a Battle Rating of around 11.7–12.7?
It could in theory be given to Türkiye but I’d rather Ukrainian vehicles sticking together. Going to the USSR tree currently has a lot of controversy so if it ever did, it’s going to be a long while.
I’d also rather Türkiye get it’s own tree since it has a good collection of ground vehicles to chose from.
The USA can receive a T-80U variant that they bought though without Türkiye.
If you want to discuss more about the T-84-120, try this suggestion.