During the 1000 year reign of Christ...?

Will the earth be desolate for the 1000 years? Near the end of the 1000 years Satan will be let loose for a short time and will go and deceive the nations once more. Who are these people? Are they the ones who are resurrected back to life but in the flesh? Or are they the descendants of the few who survived to the second coming but not resurrected to glory? At this time they (nations) will surround the city (Jerusalem)~is this referring to Armageddon or will Armageddon happen before the second coming? Please use scripture to answer these questions...