General: The World's 5 Most Lethal Tanks

The top five most lethal tanks today aren’t necessarily the newest or most expensive. Each does one thing particularly well to stand out from the crowd, making it an extremely dangerous opponent on the battlefield.
The world of the tank—an armored fighting vehicle equipped with a large main gun, tracks, and whose mission is to conduct mechanized warfare on the modern battlefield—has stagnated. Look around at the tank fleets of all the major powers and most so-called main battle tanks have been in service since the 1990s—or even the 1980s. The collapse of the Soviet Union and the shift to terrorism have placed tank forces on the back burner—or, in the case of the Netherlands, eliminated them entirely.
Most tanks—at least those in the arsenals of the West—are pretty much the same in terms of overall capability. Many countries, such as South Korea, have used the slowdown to catch up to the status quo. The top five most lethal tanks today aren’t necessarily the newest or most expensive. Each does one thing particularly well to stand out from the crowd, making it an extremely dangerous opponent on the battlefield.
The last in a long line of tanks stretching back to the late 1940s, the T-90 is the most advanced common tank in Russian Ground Forces inventory. The T-90 can trace its roots to the T-54 medium tank, and is most directly related to the T-72/T-80 series of tanks. Russia currently operates hundreds T-90As, enough to fully equip one tank and one motor rifle division.
----This Story Was Originally Published in The National Interest----
The T-90A is tops among tanks for long-range lethality. Although the 125-millimeter 2A46M main gun is less effective than its western peers, especially the Rhienmetall 120-millimeter L44 smoothbore gun, it is lethal at longer ranges thanks to its ability to fire anti-tank missiles from the gun tube. The9M119M Refleks laser-guided missile gives the T-90A the ability to penetrate 700 millimeters of rolled homogeneous armor equivalent with a high degree of accuracy at ranges of up to 3.1 miles.