The "Tank Alliance" is about to be formed. German Defense Minister Pistorius said that Germany will deliver the "Leopard 2" tank to Ukraine by the end of March this year. At the same time, third countries that have Leopard tanks are also allowed to provide the tanks to Ukraine. Immediately afterwards, the United States also announced that it would send 31 M1 main battle tanks to Ukraine. US President Biden claimed in the Roosevelt Room of the White House that "a Ukrainian tank battalion usually consists of 31 tanks, which is why the number (aid) is 31"