Labour says it will go ahead with the renewal of the Trident submarine fleet as planned by the current government even though Mr Corbyn, a lifelong opponent of nuclear weapons, has made clear that he would never authorise their use.
"The crucial thing is that there is a sharp distinction between a Government that is willing to stand up for this country, which is willing to make sure this country is properly defended and a Labour Party led by Jeremy Corbyn that would simply chuck away our ability to defend ourselves".
Corbyn will declare that he is not a pacifist despite his long history of opposing Britain's involvement in armed conflicts but will also issue a jibe at Theresa May and the Tories when he calls for "no more hand-holding with Donald Trump".
"It's an extraordinary question when you think about it".
The leaked draft - initially published by the Daily Mirror, The Daily Telegraph, BBC and other news outlets - suggested that Mr Corbyn, a left-wing politician, had decisively broken with the centrist legacy of most of his recent Labour predecessors, most notably that of former prime minister Tony Blair, who won three general elections.
"I am often asked if as prime minister I would order the use of nuclear weapons", he said. Would you risk such extensive contamination of the planet that no life could exist across large parts of the world?
Corbyn said the US-led policy of regime change "in Afghanistan Iraq, Libya, and Syria - and western interventions in Afghanistan, Somalia and Yemen have failed. and made the world a more unsafe place".
In other policy announcements, Labour committed to keeping the triple lock on pensions and the Liberal Democrats said they would build 300,000 new homes every year.
Real stay on track as Ronaldo hits goal milestone
The Colombia worldwide came off just past the hour-mark and applauded the Madrid fans, but Nacho does not think it was a farewell. There was still time for Kroos to get on the score sheet, with the Germany global finding the bottom corner in the 84th minute.
North Korea poses 'existential' threat, US intel chief warns
He said that China still needs to do more to pressure North Korea before it will change its behavior and can do more. He said that as ISIS is pushed from its stronghold of Mosul, it is preparing to regroup and continue an insurgency.
Security in Afghanistan likely to 'deteriorate': US intelligence
British combat troops left Afghanistan in 2014 but around 500 remain on the ground to train local military forces. Secretary of Defense Jim Mattis and General John Nicholson, the commander of allied forces in Afghanistan.
He said: "I am not a pacifist".
"I accept that military action, under worldwide law and as a genuine last resort, is in some circumstances necessary. We need to step back and have some fresh thinking". "It would mean world leaders had already triggered a spiral of catastrophe for humankind".
Mr Corbyn says that on entering No 10 he would order an immediate review of RAF air strikes against Islamic State (IS) in Iraq and Syria.
'We saw what happened last month at Khan Sheikhoun after the attack by chemical weapons by the Assad regime on his own people, again, ' he during a campaign visit to Newport, south Wales.
Siding with the US has led to "calamity" in Iraq and Libya "and all the other disastrous wars that stole the post-Cold War promise of a new world order", Corbyn said.
Mrs May said that the election offered a choice between "me and my team, with our eyes fixed on the future, or Jeremy Corbyn and his allies that want to take us back to the economic chaos of the past".
"The bigger threats we face are actually, I think, cyber attacks and ... irrational acts of terrorism".
"If Jeremy Corbyn thinks the way to maximise United Kingdom influence is to go around weakening the alliance between the United Kingdom and Washington then he is deluded".