Today, Biden is due to make a statement about the supply of Abram's tanks to Ukraine, and Germany must decide on sending their Leopard tanks to Ukraine and allowing other countries to transfer these tanks to Ukraine. But this is not the way to escalate the war. This is a normal way of subduing an aggressor and forcing him to peace by inflicting a military defeat on him.
That is the way to prolong the war and nothing about it is normal.
The only way to stop an invading force is to hit them where it hurts which is hitting Russian infrastructure on Russian soil.
Look at any other invasion in the history, they never end by fighting the war in the invaded territory. WW2 didn't end because Nazis were defeated in the front-lines kilometers outside Germany or for example the invasion of Yemen stopped the day the armed forces of Yemen managed to attack their invaders' infrastructure inside their own soil (eg. Aramco in Saudi Arabia, UAE airbases and US military bases in the region, etc.).
Of course that is not something that United States would ever allow Ukraine to do which is why they never send any strategically important weapons (eg. MBMs and LBMs) to Ukraine.