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Just weeks ago the warning was accelerated to Level 3 following increased tensions between US and Russia, with insiders fearing the West was creeping closer to nuclear war.
Level 3 means US troops could be mobilised in as little as 15 minutes.
But the group, made up of experts claiming to have contacts within the US security industry, have seen Donald Trump's election win as a pacifier for Russian relations.
The group wrote on its website: "The United States took a tentative step toward a more isolationist policy with its recent presidential election.
"While it will take several months to see how the US reforms its foreign policy, already some world leaders have expressed hope that relations could improve, including Russia and Syria.
"If the new US President keeps to his previous statements, look for the United States to withdraw somewhat from military confrontations in the Middle East and possibly European theatre, though it is highly unlikely it will abandon NATO commitments, and the Ukraine will likely pop up again in the near future.
"Russia, however, will probably wait to see what the new President does, as well as now being hampered by the coming winter."
Donald Trump's election as president of America was welcomed by Vladimir Putin, leader of the US' biggest rival Russia. He said he hoped the pair would be able to work well together towards a more friendly relationship between the two superstates.
The group did warn, however, about some remaining threats to US and world security.
It said: "China and North Korea ... continue to either cast a wary eye or are outright belligerent. Israel ... will become more of a focal point again.
"Meanwhile, more troops are to be sent to Europe in 2017 to bolster defences against Russian movements and NATO continues building up forces in Poland and surrounding areas to protect against a potential Russian assault."
While the US government also uses the Defcon system, it is private and not available to the public, so public records are estimates.
Level 5 means the US Department of Defence should be at its lowest state of readiness for nuclear war.
This one fact alone makes it all worth it!
Now I can look at those war-mongering Trump protesters in a clear light, a light that brings them up really well in my scope.