German security officials believe the Kremlin is laying the groundwork for a potential large-scale conventional war with NATO by the end of the decade.
German media outlets Süddeutsche Zeitung, WDR, and NDR also cite the report, noting that Russian President Vladimir Putin appears intent on testing NATO’s Article 5 guarantees. The alliance’s mutual defence clause obliges member states to come to one another’s aid if attacked. The assessment suggests Putin may seek to challenge how seriously that commitment would be honoured.
Maybe this is a suicidal plan, Putin is going to die and wants to take the world with him. From what we know about him, he is megalomaniacal and sadistic enough to want something like this.
He must also be counting on the United States being out of NATO by then, maybe Trump will even send some soldiers to help his Russian allies.
It has nothing to do with wanting to actually fight NATO. The idea is to manufacture a carefully crafted situation where Article 5 is triggered, but due to internal disagreement and individual risk, it is not fully honored.
Needless to say, any such move would be very risky.
Just based on Trump's previous administration I'm confident that if he actually tried to do that it would cause serious arguments between the military and the executive branch. The military already decided to pretty much ignore him when he was going on in his last term about nuclear weapons, fortunately it never came up.
The number of personnel won't really matter here past a threshold. Looking at Ukraine Russian war it's clear most of the fighting will be done with suicide drones, ones that can be produced en mass by any country more or less.