It appears that the US weapons can only be used in the Kursk region where Ukraine holds land, hoping that this gives Ukraine some leverage in any peace talks. As for this escalating the war Putin is using troops from that Nutter in North Korea that's not an escalation??????
The only way this war will stop is by Ukraine giving up land and not being allowed to join NATO or the EU which will be a total victory for Putin. This will cause a resistance movement in Ukraine similar to what happened in France and Ireland and give Putin the excuse to invade Ukraine again. The man won't be happy until the USSR Is formed once again.