The Stellar Ancient Domain of Regnum Merciae is a colossal, socially progressive nation, ruled by King Offa of Mercia with a fair hand, and renowned for its multi-spousal wedding ceremonies, daily referendums, and public floggings. The hard-nosed, hard-working, democratic, devout population of 3.643 billion Andarian Stellar Mercian Warriors enjoy a sensible mix of personal and economic freedoms, while the political process is open and the people's right to vote held sacrosanct.

The medium-sized government juggles the competing demands of Administration, Education, and Industry. It meets to discuss matters of state in the capital city of Tamworth. The average income tax rate is 37.0%, but much higher for the wealthy.

The strong Andarian Stellar Mercian Warrior economy, worth 264 trillion Sceats a year, is broadly diversified and led by the Information Technology industry, with major contributions from Retail, Door-to-door Insurance Sales, and Woodchip Exports. State-owned companies are reasonably common. Average income is 72,723 Sceats, and distributed extremely evenly, with little difference between the richest and poorest citizens.

Foreign ambassadors are accused of stealing Andarian Stellar Mercian Warrior jobs, popular political cartoonists are thrown in jail for inciting dissent, it's widely agreed that to tennis players love means nothing, and the deaf are perplexed when the weather report tells them that the wind will be "bringing some rain along the Nazi ghosts". Crime, especially youth-related, is totally unknown, thanks to a capable police force and progressive social policies in education and welfare. Regnum Merciae's national animal is the Falcon, which teeters on the brink of extinction due to toxic air pollution, and its national religion is Pantheism.

Regnum Merciae is ranked 244,711^th in the world and 2^nd in The Auriga Constellation for Highest Unexpected Death Rate, scoring 28.53 on the Bus Surprisal Index.