Russia's unsustainable equipment losses in Ukraine
You could pick almost any military in the world including the U.K., France and Germany and these losses would exceed their total inventories.
According to the open-source database Oryx, Russia has lost 1,183 tanks and 1,304 infantry fighting vehicles since its invasion of Ukraine on Feb. 24. Even more extraordinary is that Ukraine has captured a good percentage of them: 389 tanks and 415 infantry fighting vehicles, many of which, in both categories, have already been repurposed for combat against their former owners. These numbers are just the Russian losses that have been visually confirmed; the actual figures are probably much higher.
Ukraine has lost equipment, too, but not nearly as much, owing to its relative lack of hardware, careful protection of what it does possess, and the defensive nature of its war thus far: 1,627 pieces, including 267 tanks and 244 infantry fighting vehicles, as per Oryx.
On the face of it, Russian losses are unsustainable. But even more extraordinary is that its elite units are hemorrhaging the most materiel. After Ukraines Kharkiv counteroffensive, in which Kyiv is estimated to have retaken as many as 3,500 square miles, the 4th Guards Tank Division lost nearly 100 of its T-80U tanks. (The 4th Guards Tank Division is the only unit that operates this model.)
https://www.yahoo.com/news/russia-ukraine-tanks-equipment-destroyed-172523969.html