NATO members agreed Wednesday to increase the use of cyber weaponry and tactics during military operations, with the alliance also upgrading other capabilities to combat a resurgent Russia.
The changes are part of the alliance's biggest shakeup since the Cold War, with defence ministers backing the creation of two new command centres to help protect Europe.
The revamp reflects the "changed security environment" of recent years, NATO chief Jens Stoltenberg said at a meeting of defence ministers in Brussels.
The threat to the alliance's eastern flank has grown as a concern after Russia's annexation of Crimea in 2014.
"We are now integrating cyber effects into NATO missions and operations to respond to a changed and new security environment where cyber is part of the threat picture we have to respond to," Stoltenberg said.
"In any military conflict cyber will be an integral part and therefore we need to strengthen our cyber defences and our cyber capabilities," he added, noting that such tactics have been effective in the fight against IS in Iraq and Syria.
After years of stripping back its command structure since the end of the Cold War, NATO wants to add the new command centres -- one to protect lines of communication across the Atlantic and one to coordinate the movement of troops and equipment around Europe.
- NATO hit by cyber attacks -
The creation of a new NATO cyber operations hub comes as the alliance faces hundreds of attacks on its networks every month and fears grow over the Kremlin's electronic tactics.
NATO declared cyber -- where attackers disrupt websites, intercept communications and sabotage technologies used in combat -- as a conflict domain last year, putting it on a par with land, sea and air.
"We have seen a more assertive Russia, we have seen a Russia which has over many years invested heavily in their military capabilities," Stoltenberg said.
"NATO has to be able to respond to that. We are constantly adapting and what we are doing in Europe now is part of that adaptation."
Cyber capabilities will now be included in NATO missions in the same way as planes, tanks and ships -- fully integrated but still under the control of the contributing country.
The two-day meet at NATO headquarters will also cover the North Korean nuclear crisis, which will be the focus of a working dinner on Wednesday, where defence ministers will be joined by the EU's diplomatic chief Federica Mogherini.
US President Donald Trump arrived in on Beijing Wednesday to press China to do more to get Pyongyang to curb its nuclear and ballistic weapons programmes.
- US role in Syria? -
Tensions have soared since Pyongyang carried out its sixth nuclear test -- its most powerful to date.
"All NATO allies agree that we have to put strong pressure on North Korea because North Korea is responsible for reckless behaviour, irresponsible behaviour developing nuclear weapons and by developing missiles," Stoltenberg said.
On Thursday talks will turn to Afghanistan, where NATO plans to boost its training and support mission for local forces by some 3,000 troops.
Later in the day US Defense Secretary Jim Mattis will hold a separate meeting with partners from the coalition fighting IS in the Middle East, where the jihadists continue to lose territory.
As he flew to Europe, Mattis told reporters that coalition partners are looking to the United States for a clear plan about what follows the physical defeat of IS.
"Maybe three-quarters of the questions I am getting asked now is (about) going forward. They are now saying: 'What's next? How is it looking?'" Mattis said.
Following back-to-back losses, including of their Syrian and Iraqi strongholds of Raqa and Mosul, IS fighters are down to defending their last holdouts along the Euphrates River valley.
America's military involvement in Syria has until now been focused solely on fighting IS.
A French source also said allies were keen to hear what Mattis had to say about the role of Iran -- a key supporter of Syrian President Bashar al-Assad -- following Trump's tough rhetoric against Tehran.