This is John Bachelor, conversation with my colleague Colonel Jeff McCausen, United States

Army Retired artillery men, CBS News, Dickinson College, Diamond Six Leadership and Strategy,

asking about the probe, the incursion, the operation that Ukraine has launched into Russia.

What scale, what mission, what direction and I asked Jeff if he was leading an armor column what

would be included here he gives an answer of what we can discern so far an attack force of about a thousand people and get in, get out. What

about preparing for the retreat or the advance in another direction or the exit.

Colonel Jeff McCausons, CBS News commenting on what we know fog of war of the Ukraine

operation inside Russia.

More of this tonight.

Absolutely, I mean, the big question is this an invasion or an incursion?

Well, I'd say it's more of an incursion because you certainly don't plan to march on Moscow.

That's not not in the cards. And the size of the force is still frankly relatively small.

I've seen numbers of a thousand to 1500s. So This is sort of a brigade level operation. This is not exactly the core in the attack, but it's not insignificant.

As a consequence, I've got to think about when I'm going to pull back and where I'm going to pull back to.

Now perhaps, and I haven't been able to get information on this, perhaps you're moving with a certain

number of engineer support. So as you advance forward, engineers coming behind you and they begin preparing defenses that you can draw back through then if you want to maintain control of a certain portion of the territory, but then those are now more defensible and that might be a crime.