Countries may be forced to choose whether they side with the US or China when it comes to Huawei.
British interests come first, but Leave voters don't necessarily want to retreat from international obligations.
The battle for military power intensifies as Britain faces mounting threats alongside economic uncertainty.
The UK has fallen victim to drones, chemical weapons and cyber-attacks in recent years. But at least it's got a really big boat.
Supporters and opponents to the withdrawal deal both say national security is under threat – but the truth is that neither side can guarantee anything at this stage.
The French president has a vision for a more integrated Europe – and Brexit feeds right into that.
The UK has never ironed out the ethics of its role in the arms trade. Will the debate ever be resolved?
We are witnessing the transformation of the existing defence business into one which embraces the new.
A new position paper on co-operating with the EU on defence assumes a lot and suggests very little.
The way Corbyn's Labour has handled Trident and defence is perfectly in line with Labour's history since the 1960s.
Reports of a failed Trident missile launch have all sorts of political and security implications – but they don't necessarily spell catastrophe.
Forecasts that Britain's withdrawal from the EU will send the world into a state of war are wildly overblown.
The US has been mounting semi-secret drone strikes in Yemen for years – and it seems the UK has been deeply involved.
Laugh at Jeremy Corbyn all you like, but he's right: nuclear deterrence isn't a zero-sum game.
PM wants more unmanned intervention but he should be wary of putting all his eggs in one basket.
The true scale of the war against IS has gone largely unremarked on – until now.
From the UK, to Canada, Australia and the states – our opinions about the military are usually wrong.
With austerity on the agenda, the upcoming strategic reviews will be critical to deciding the future of the UK's defence force.
New research shows the UK's military heft depends on a thriving domestic industry to buy things from – and we may be about to cut it drastically.
Ed Miliband's attack on David Cameron's foreign policy seems to have hit home. But is it deserved?