Former US defence secretary Robert Gates, who served under presidents George Bush and Barack Obama, focused on cuts to the UK Navy as particularly damaging. He said that for the first time since World War One, Britain did not have an operational aircraft carrier.
The Ministry of Defence has defended levels of spending within the military spending, and said that the UK had the best equipped and well trained armed forces outside of the US.
More top news
Lord Sugar has told Katie Hopkins to "shut up" after the ex-Apprentice contestant criticised celebrities who paid tribute to Cilla Black.
Jeremy Corbyn's economic policies would harm the poor and leave the Tories in power for a decade, Chris Leslie has warned.
Landlords have been warned they could face up to five years in prison if they fail to remove illegal immigrants from properties.