The Archduchy of Mars City is a gargantuan, efficient nation, ruled by Viceroy de Mars City with an even hand, and notable for its sprawling nuclear power plants, otherworldly petting zoo, and keen interest in outer space. The hard-nosed, democratic, humorless population of 17.148 billion Mars Cityians have some civil rights, but not too many, enjoy the freedom to spend their money however they like, to a point, and take part in free and open elections, although not too often.

The medium-sized, corrupt government is primarily concerned with Defense, with Education, Industry, and Administration also on the agenda, while Welfare is ignored. It meets to discuss matters of state in the capital city of Mars City. The average income tax rate is 81.5%, and even higher for the wealthy.

The frighteningly efficient Mars Cityian economy, worth a remarkable 4,112 trillion Martis Golds a year, is driven entirely by a combination of government and state-owned industry, with private enterprise illegal. However, for those in the know, there is an enormous, deeply entrenched, broadly diversified black market in Information Technology and Arms Manufacturing. The private sector mostly consists of enterprising ten-year-olds selling lemonade on the sidewalk, but the government is looking at stamping this out. Average income is an amazing 239,825 Martis Golds, and evenly distributed, with the richest citizens earning only 2.4 times as much as the poorest.

People stand their fridges back-to-front to benefit from the free heating, a passport is literally priceless, much of Mars City's computer network is controlled by a rampant artificial intelligence, and cutting-edge missile systems are being retrofitted to twin-prop air force biplanes. Crime, especially youth-related, is totally unknown. Mars City's national animal is the Wolf, which teeters on the brink of extinction due to widespread deforestation, and its national religion is Genesiusiany.

Mars City is ranked 239,489^th in the world and 20^th in Genesius Union for Safest, scoring 18.46 on the Bubble-Rapp Safety Rating.