@Rajk999 said300 km’s is the range.
The issue is that now Ukraine is firing long-range missiles at Russian towns and weapons installations far inside Russian territory. Whoever supplies Ukraine with these are going to come under attack from Russian nukes. This is what Putin threatened. The UK is on the list.
-Removed-As you have an extremely short memory, I will re-post: 😆
"You forgot 1917. Did you NEVER pay attention in History Class!?!"
Now you need to Google WWI and read about the OTHER way conflicts end. The way you forgot to list but which is very relevant to the Russia-Ukraine conflict.
I'm not here to read to you.