Benjamin Rosenthal is a Mossad agent.
Major Benjamin Rosenthal was monitoring the group known as Majestic-12, made up of twelve of the richest men in the world. He eventually discovered that M-12 planned to initiate a new 50-year long Cold War, by launching American Chameleon missiles at various places around the world.
When M-12 started a bounty hunt to remove all those who would stop them, Rosenthal was put on their liquidation list.
Rosenthal was at the Mossad's office at the Canary Wharf's King Tower, being debriefed by his superiors on M-12's plan when Mother and Book II, friends of Shane Schofield, another one of those targeted on the bounty list, came looking to see what he knew.
However the office came under attack from IG-88 members looking to claim the bounty on Rosenthal's head. Book II found Rosenthal and protected him from their enemies until they got to the roof, where he was shot in the head, but not before he told the Marine where to find his notes on M-12's plans.