To create a situation to suspend firearm possession is real simple: Use noise. Marxists always use noise. It goes like this: Create the treaty to regulate “unlawful” international firearms sales and “dangerous weapons”. Regulate “Assault Weapons” as “Dangerous Weapons”. Let some yahoo someplace like Texas or North Carolina fail to turn in their AR-15 or AK-47. Let the local police handle the manner knowing violence may result. Once violence results, add in the National Guard, just a few soldiers. Let them come under attack then claim the UN has a special force under the treaty that has been specifically trained to handle this type of situation. They arrive to more upset and noisy people. Before you know it, even more UN troops must arrive to handle those situations. Make constant press releases about this violent person/group and that one and keep reassuring the American people that Obama has it all under control but there is so much hate and violence which proves the gun treaty is warranted.
In all that resulting noise people till forget just who started what. Half this nation will be all for the treaty and the gun confiscations and the UN presence.
I can see your scenario happening. So perhaps can others and have plans to counter them.
Secession is sounding better all the time