Russia Sends Obsolete Tanks to Battle in Ukraine Amid Staggering Artillery Losses - The Moscow Times

How Russia Lost an Epic Tank Battle, Repeating Earlier Mistakes - The New York Times

After Russia's Invasion Of Ukraine, Bulgaria Is Rapidly Trying To Modernize Its Armed Forces

A rush to failure': How the Russian military started off so badly in Ukraine

Russian Military's Next Front Line: Replacing Battlefield Equipment Destroyed in Ukraine - WSJ

The Ukraine effect: demise or rebirth of the global order?

Values Martens Centre

Russia's losses exceed 271,000 soldiers

Russia-Ukraine war: Kyiv to receive 'hundreds' of tanks from several nations, says Lithuania – as it happened, Ukraine

Case Blue: the Eastern Front between Barbarossa and Stalingrad

If the Russians are so ill equipped and bad at what they do (especially their commanders), why haven't Ukraine won yet? - Quora

Russia Loses 21 Tanks, 17 Artillery Systems in a Day: Ukraine