what are the us standards for main battle tanks?

Symbolically, the presence of US and German-made tanks in Ukraine is more problematic. Just as important, however, is the need to continue to supply long-range artillery to Ukraine to degrade Russia’s logistical capabilities and destroy troop concentrations. Tanks can deliver rapid gains of territory to the Ukrainians in a summer offensive. If these conditions are met and if the west makes available the 300 tanks that the Ukrainian leadership demands, they can be a gamechanger. Provided the Ukrainians can cope with the fact that they will need different ammunition, spare parts and possibly fuel they can make a difference, significantly enhancing Ukraine’s capability to defend its territory. In purely military terms, well-trained, well-led and motivated Ukrainian tank crews operating the Leopard 2 or M1 Abrams will be better protected, have better firepower and be more manoeuvrable than their Russian counterparts. The export of German and US tanks to Ukraine is not without risk, both real and symbolic.

The decision that Germany and the US will allow the export of M1 Abrams and Leopard 2 tanks to Ukraine, alongside the British Challenger 2 tanks promised in mid January is the culmination of Nato’s policy to assist Ukraine and an important symbolic step in the west’s response to Putin’s aggression.

What are the us standards for main battle tanks?