I've wrapped up this game on the Something Awful forums, and now I'm going to try and post a summary of events here with the benefit of hindsight, a proper after action report.
The First Orange War.
The New Republic of Sovisum III was formally established in the Winter of 231AA following the centuries of darkness brought by the Dissolution War. Oral histories spoke of a republic spanning many stars, and out of the ruins of the former planetary senate rose a city-state trying to emulate that great empire of old.
The Spring of 240 marked the ninth year of expansion out of the capital city of Silvervale. In the process of expansion, other states attempting to reclaim the planet were encountered. The so-called 'Queenstate' emerging from the great southern deserts was particularly aggressive in clawing their way outwards from their capital of Regula. Things were coming to a head, and the Rostock crisis proved to be the boiling point.
After offering their protection to the far-flung farmer state of Rostock, Queenstate found themselves in possession of the territory after an aggressive theocracy out of Sparenhausen declared war on the farmers. These events were observed with horror in Silvervale, who had until now considered Rostock to be within their sphere of influence, the senate decided that something must be done. The theocracy was invaded and Sparenhausen taken. Queensstate was badly stretched by the sudden acquisition of Rostock and had needed to raise a second SHQ to simply supply the farmers. By the Spring of 240 a simple dirt road now wound all the way from Regula to Rostock, but lay on a thin undefended corridor. As Queenstate moved to consolidate their foothold in the north by taking the raider city of Lodmont, it was time for decisive action. The Republic was going to war.