The arrival of the US M1A1 Abrams tanks in Ukraine was hailed as a turning point in the war. Coming in at roughly $10 million a unit, the Nato stalwart was supposed to provide the armoured fist that would punch through the Russian lines. But tactics evolve quickly in warfare, and Russia’s use of surveillance and hunter-killer drones has led to heavy casualties for Ukraine’s tank fleets. This is alarming for NATO. If Russia has found critical vulnerabilities in our armour, our borders are beginning to look very vulnerable.

https://www.yahoo.com/news/russia-found-critical-vulnerability-nato-122350438.html