Tens of thousands of troops from NATO allies and partners will join forces for joint military exercises from October 25 to November 7 in Norway.

Russia has been invited to observe the upcoming Trident Juncture drills for increased transparency, as well as to ensure the intended deterrence message is received in Moscow, a senior NATO commander revealed Friday.

NATO allies and a handful of partner countries are gearing up for the alliance's largest joint military exercises in decades.

Ahead of the Trident Juncture exercises, which are expected to include 45,000 troops, 10,000 vehicles, 60 ships, and 150 aircraft from 31 countries training side by side in and around Norway this fall, the alliance is stressing strength and transparency, and just invited Russian observers so they can get the message up close.

The US Navy admiral commanding the exercise hopes Russia will take them up on the offer.

"I fully expect that they'll want to come. It's in their interests to come and see what we do," Admiral James Foggo told reporters at the Pentagon Friday, "They'll learn things. I want them to be there so they can see how well [NATO allies and partners] work together."

"There's a strong deterrent message here that will be sent," he said. "They are going to see that we are very good at what we do, and that will have a deterrent effect on any country that might want to cross those borders, but especially for one nation in particular."

So far, Russia has yet to accept the offer.

The drills, Article 5 (collective defense) exercises, will include land, air, and amphibious assets training to repel an adversary threatening the sovereignty of a NATO ally or partner state. The admiral refused to comment on whether or not the exercise would include a nuclear element, as an earlier Russian drill did.

Although it was previously reported that these exercises are the largest NATO drills since the Cold War, they are actually the biggest since 2002, Foggo clarified at Friday's briefing. The allied drills come on the heels of massive war games in eastern Russia involving tens, if not hundreds, of thousands of Russian and Chinese troops preparing for large-scale military operations against an unspecified third country.

The purpose of Trident Juncture, according to handouts presented at Friday's briefing, is "to ensure that NATO forces are trained, able to operate together, and ready to respond to any threat from any direction."