I dunno if y'all are still doing flag requests, but I'd like to request one.
It's for a country known as the "Circle of Steel", an HRE-like entity from the same setting as the RSER flag. The Circle of Steel is an industrial conglomerate of states surrounding an iron desert the size of Alaska, where an entire nation of slaves work to keep the Circle's forges fed with raw materials. The Circle is basically composed of five large nations - the Empire of Ke Manun, the Kingdom of Hrot, the Domain of the Sorcerers, the Anthracite League, and the Confederation of the Many Prosperities. Ke Manun is the dominant state, as it was responsible for unifying the traditionally-disunited states surrounding the Ironsands. All the other members of the Circle are unimportant vassals who swear oaths of tribute to the Circle's Dead-King, Lord Tsurandukaatha, or are vassal-states of the five great nations (who in turn also pay tribute to Tsurandukaatha). The Circle is in many ways the most futuristic of the great empires of Cedkh - churning out such impressive innovations as the railroad and the electric telegraph, along with producing some of the finest artisans, mages and alchemists in Cedkh's northern hemisphere. It almost makes up for the widespread slavery, brutality and ruthless imperialism.
Anywho, my idea for the flag is that it would prominently feature two chief symbols. A grey ring, to symbolize the nation itself. And an owl, also grey and, preferably, resembling the Owl of Athena. Black and green should be prominent colors as well, but other than that, I leave the design to your discretion, though it should be a short square shape, similar to the RSER flag.