Plaid Cymru will provide a "strong voice" for Wales outside of Europe as the party made a pitch to capitalise on opportunities brought by Brexit.
The Party outlined policies to tackle veterans' physical and mental health issues, their opposition to the renewal of Trident and their record voting against the Iraq war and air strikes in Syria.
The manifesto also states that Plaid Cymru "oppose military action without UN and Parliamentary authority".
Plaid Cymru's key points on defence:
Plaid Cymru will also resist any attempts to relocate Trident in Wales and "will instead invest in home-based troops and strengthen our conventional forces."
Adding they will:
"Base our regiments at home in Wales with a properly funded and looked-after defence force."
Forces News spoke with Plaid Cymru's Defence Spokesman Hywel Williams:
The nationalist party has candidates contesting all 40 of Wales constituencies.
Ms Wood told BBC Radio 4's Today programme: "We need a strong voice now as Wales leaves the European Union - and its only Plaid Cymru MPs that will provide that voice to defend Wales and develop the country as we move forward over the next months and years."
She went on to say:
"There are opportunities potentially as we leave the European Union, as long as we do it properly, and as long as we don't do it in the most extreme way, there are opportunities potentially for increased procurement to local firms - that's just one example."
She dismissed unfavourable comparisons with the SNP, saying Scotland was at "a different stage" in its devolution process.