And this is where Mr. Guaino is correct to accuse the West of sleepwalking. The United States is trying to maintain the fiction that arming one’s allies is not the same thing as participating in combat.

In the information age, this distinction is growing more and more artificial. The United States has provided intelligence used to kill Russian generals. It obtained targeting information that helped to sink the Russian Black Sea missile cruiser the Moskva, an incident in which about 40 seamen were killed.

And the United States may be playing an even more direct role. There are thousands of foreign fighters in Ukraine. One volunteer spoke to the Canadian Broadcasting Corporation this month of fighting alongside “friends” who “come from the Marines, from the States.” Just as it is easy to cross the line between being a weapons supplier and being a combatant, it is easy to cross the line from waging a proxy war to waging a secret war.