Calls to keep talking are getting louder out of fear of escalation and ultimately war – but why are diplomatic relations so difficult for Nato and Russia?
Turkey is a NATO member but that doesn't mean its NATO allies will come to its support in Syria.
Can the key external enablers of Libya's conflict also be peacemakers?
President Trump's speech about Iran wasn't just aimed at that country or the US. He also targeted NATO allies, urging members of the alliance to step up and help US efforts in the Middle East.
Iran's missile strikes on Iraqi bases in response to the killing of Iranian general Qassem Soleimani have raised tensions between the U.S. and Iran. But war seems unlikely at this point.
Donald Trump likes to poke fun too.
Simulations help prepare students for challenges outside the classroom.
NATO had its 70th birthday party in London at an awkward moment.
The US president, Donald Trump, has arrived in the UK for a summit of NATO leaders – but it's awkward timing for the British prime minister, Boris Johnson.
As the North Atlantic Treaty Organization celebrates its 70th anniversary with a leaders' meeting in London, five US scholars shed light on NATO's history and its potential future.
Why the EU and NATO have struggled to cooperate fully.
With Brexit on the horizon, Britain's role in NATO won't change, but its defence priorities might.
Since the 1940s, Congress has largely let the president make decisions, while members of the House and Senate endorse or condemn those actions from the sidelines.
Why NATO has lost its leverage to do anything about Turkey's offensive in northern Syria.
Following announcements by France and the US, NATO is expected to start using space weapons.
The fallout for President Trump from his conversation with Ukrainian President Zelenskiy was swift and harsh. The consequences for Zelenskiy and his country could also be serious.
The NATO-led military intervention in Libya has just fuelled more violence.
Turkey's authoritarian leader, Recep Tayyip Erdoğan, was handed a big defeat recently when his party's candidate lost a crucial election contest. Is this the beginning of Erdogan's demise?
The fallout from this 78-day military campaign continues to be felt.
Five years after Crimea returned to Russia, the east-west stalemate over Ukraine is far from stable.