(the following refers to the worldlines of the American Mandate)
The Millennials born 1983-2005 Civic-Adaptive
Like the generation that fought the First American Civil War, their crisis came too soon and was resolved ambiguously, whipsawing between the First Terrorist War under George W. Bush, the feckless delusions of the Barack Hussein Obama Administration, and the return to battle in the Second Terrorist War. In their youth, they fought hard but were frequently betrayed, as their Boomer and Slacker leaders repeatedly shifted direction, and initially failed to take the Terrorist threat with sufficient seriousness.
In their prime (2005-2047) they built greatly and enduringly. This is the generation that returned to Luna and colonized Mars, restored the economy after the Second Great Depression, and led the conquest of the Carribean Basin in the Third Terrorist War. But here too they suffered repeated betrayal: their hero President John Garcia failed to prevent the San Antonio Massacre, in which the Narcoterrorist government of Mexico executed a partially-successful nuclear strike against Texas.
Their next hero, President AnthonyPowers, staged a coup from above and made himself the first President to rule the United States of America as a dictatorship, bringing about the fall of the First American Republic in 2040. He completed the conquest of Mexico, winning the Fourth Terrorist War and completely securing American control of the Carribean. By the time that President Biggs restored the Republic in 2045, they had become more than a little cynical of their political leadership.
They were also quite divided, which became obvious once they started moving into leadership positions (2025-2069). They ran the cuntry under Powers and Biggs and the Crazy Fifties. When they advanced into high leadership positions their generalship was largely ineffective in the Second Pacific War. They were saved from the consequences of their indecision by General Randall O'Hare, himself a late Millennial (born 2001). They then led on both sides in the Second (2067-69) and Third (2076-77) American Civil Wars, which ended with the victory of President George Custis Lee.
As elders, many saw their lives blighted by these wars, and they were only too happy to surrender their freedom to George C. Lee when he assumedthe title of Commander Lee the First in 2080. Only the oldest Millennials (such as Jeanne Delarue) remembered a time when the American government did not rule unconstitutionally, save for the brief golden age under Garcia. They had decided to put their trust in princes rather than principles; by and large Commander Lee I did not betray them. Most Millennials died before the suppression of the Omeganists or the Belt Rebellion.