* M1 Abrams (United States): The M1 Abrams is a third-generation main battle tank that has been in service with the United States Army since the early 1980s. It is known for its excellent armor protection, maneuverability, and firepower, and it has been used successfully in a number of conflicts, including the Gulf War and the Iraq War.
* Leopard 2 (Germany): The Leopard 2 is a third-generation main battle tank that has been in service with the German Army since the late 1970s. It is known for its high-quality engineering and construction, as well as its excellent mobility and firepower. The Leopard 2 has been used by a number of countries, including Germany, Turkey, and Canada, and it has seen combat in a number of conflicts, including the Balkans and Afghanistan.
* Challenger 2 (United Kingdom): The Challenger 2 is a third-generation main battle tank that has been in service with the British Army since the late 1990s. It is known for its very good armor protection and firepower, and it has been used in a number of conflicts, including the Iraq War and the War in Afghanistan.
* T-90 (Russia): The T-90 is a third-generation main battle tank that has been in service with the Russian Army since the early 1990s. It is known for its low cost and ease of maintenance, as well as its good mobility and firepower. The T-90 has been used by a number of countries, including Russia, India, and Algeria, and it has seen combat in a number of conflicts, including the Chechnya War and the Syrian Civil War.
These are just a few of the many excellent tanks that are in service around the world today. Each tank has its own strengths and weaknesses, and the best tank for a particular mission will depend on a number of factors. However, the tanks listed above are all widely considered to be among the best of the best.