I am sure that Defence would become a priority under Corbyn because the Services will need to be realigned with those more further to the East. One thing is for sure, the UK is extremely unlikely to remain a member of NATO, or any other Western defence agreement post an extreme leftist, Marxist/Trot, Government. Corbyn will be "re-educated" in a Gulag and McD etc, will be running the show.
Am I paranoid Orwellian? Absolutely!, and I suspect I am not alone.
IG