Jacobite Mars refers to the Martian state that seceded from the original English colony on Mars in 1688. Following the Glorious Revolution in England, on Earth, the Catholic King James II was deposed and replaced with the Protestant King William III and his wife Queen Mary II. The Kingdom of England had established a colony on Mars after the Restoration of 1660, and many colonists remained loyal to King James, and so declared their independence from the main colony in 1688. Various attempts to send Jacobite colonists back to Earth to join Jacobite armies in Britain failed. Nevertheless, despite being completely isolated from Earth, the colonists clung to their old political and religious beliefs. Jacobite Mars and the Commonwealth of Mars (another independent Anglo-Martian state) were polar opposites, the former was ultra-Catholic, the latter was ultra-Protestant, and Puritan. These two states were separated by nearly 1,000 kilometres, but continued to resent each other.
Jacobite Mars found it difficult to practise absolute monarchism when its absolute monarch was millions of kilometres away. When making very important decisions, it tried to contact the Jacobite Pretender who was on Earth, but he often failed to respond or care. While the Jacobite pretender liked the idea of having a kingdom somewhere, unreachable but ruled by him, he viewed it as not immediately important and was more focused on regaining his kingdom on Earth.