Brits told to leave Ukraine

[Lilith7]

putin has an advantage over the americans et al
autonomy, he can make decisions in real time, nato etc can only react, and then only after much hand wringing and self flagellation.
i think its the usa posturing, putin is going in.

He may well do, but I think the USA will get involved if he's stupid enough to do so. They're not usually slow to get involved in other people's wars.