I think it's Distrito Federal
I'm pretty sure that the answer is 'the Romans"
Mit'a was effectively a form of tribute to the Inca government in the form of labor, i.e. a corvée. In the Incan Empire, public service was required in community-driven projects such as the building of their extensive road network. Military service was also mandatory
The leader who was in the USA was Jimmy carter. in Britain the prime minister was James Callaghan. However this is because the detente collapsed in 1979 after soviet invasion of Afghanistan.
As per the question however, in the 1980's the USA leader was Reagan and great Britain was Thatcher Margaret.
