Interesting...
"In mid-January, US President Joe Biden instructed CIA chief William Burns to assess whether Kyiv and Moscow were willing to negotiate.
The offer to Kyiv read: peace for land, the offer to Moscow: land for peace. The "land" is said to have been about 20 percent of Ukrainian territory. That's about the size of the Donbass. Both sides, the two politicians report, refused. The Ukrainians because they are not willing to have their territory divided, the Russians because they assume they will win the war in the long run anyway.
According to the two German sources, after Burns failed with his diplomatic mission in Kyiv and Moscow, President Biden decided to give in to the German Chancellor's urging and authorize the delivery of main battle tanks to Abrams. "