Romans were a rational and sensible people, so, after the first stinging defeat of the legions, Augustus would have done the smart thing and surrendered. After successfully establishing a base in Rome the MEU would set up a corrupt and incompetent government who would force legislation and a socio-political system incompatible with the mind-set, culture and beliefs of the inhabitants of the Empire sparkling a series of rebellions in the provinces motivated by perceived threats to religion/identity. The MEU has to be divided and sent piecemeal to fight elusive guerrillas. The discipline brakes down and half of the marines decide to live an epicurean life while the other half go to Judea to look for Jesus. They are eventually absorbed during the period of conflicts sparked by the Marines invasion, border wars, pretenders and rebellions. In the end peace is reestablished by a new emperor, a former roman general from the Rhine limes who showed talent and ruthlessness in his use of rifle legions and mortar auxila.