For those curious, I went back through to see how many characters were potential contemporaries of those in the AR campaign. Yamamori is 75 as Klondike starts. There are 4 confirmed individuals his age or older with another 1 likely older (Nathan Faraday) and two others possible (Daniel Mattlov, Lisa Buhallin). The following individuals though actually fought at least at some point during the Amaris Civil War.
Blood Spirit - Khan Colleen Schmitt, fought in the Terran Resistance (Age 66 at start of Klondike)
Burrock - Herve and Nigel Polczyk, former RWR troops (Twins Age 68 at start of Klondike)
Cloud Cobra - Khan Windham Khatib, founder, previously Captain and one of the few surviving members of the 335th Battlemech Division (Age 65 at start of Klondike)
Fire Mandril - Captain Nathan Faraday, served with the SLDF, was one of the 800 and served 4 Khans
Goliath Scorpion - 1st Khan Cyrus Elam, former SLDF Corps of Engineers (Age 71 at start of Klondike)
Hell's Horses - 1st Khan John Fletcher C.O. of the 35th SLDF Infantry Division (Age 76 at start of Klondike)
Ice Hellion - 1st Khan, Stephan Cage previously 3rd Battalion Commander SLDF 200th Dragoon Regiment (Age 66 at start of Klondike)
Jade Falcons - 1st Khan Elizabeth Hazen, spent more than a decade in the SLDF before retiring and then going on the Exodus, (Age 80 at start of Klondike) Daniel Mattlov Ace Pilot in the SLDF who served during the Amarais Civil War, Lisa Buhallin - fought a guerilla campaign on Terra up to and including it's liberation
Nova Cats - 1st Khan Phillip Drummond, Major in the RWR, 832nd Amaris Dragoons pre-Coup, then surrendered and joined the SLDF and fought in the Amaris Civil War (Age 75 at start of Klondike)
Snow Ravens - 1st Khan Stephen McKenna, SLDF Admiral who fought in the Amaris Civil War (Age 76 at start of Klondike)
Star Adder - 1st Khan Absalom Truscott, SLDF 'Mech commander involved in the liberation of Moscow, (Age 65 at start of Klondike)
Wolf - 1st Khan Jerome Winson - Fought in the war against the Rims World Republic and served on General Kerensky's staff (Age 66 at start of Klondike)
With a sweep of his...
Hat