Commonwealth

Commonwealth (連合王国) is a powerful island nation with many colonies in the alternate world. Its capital city is Londonium. It initially stayed neutral at the beginning of the Great War. However, the Commonwealth became hostile to the Empire after the Republic was pushed back by the Imperial Army, and finally declared war when the Empire rejected its requirement for “restitutio in integrum”.

International Relations
Unified States (合州国) - A special relationship between the two nations exist due to past colonial history. During the Great War, the Commonwealth received both equipment and volunteers from the Unified States and also purchased numerous war material from US arms companies. Of particular note is the deployment of an aerial mage unit by the Unified States on the behalf of the Commonwealth.

Francois Republic (フランソワ共和国) - Before the Great War, the Commonwealth did not have warm relations with the Republic due to historic animosity. The Commonwealth had stayed neutral at the beginning of the Great War due to concerns that the Republic would upset the balance of power in the world if the Empire was defeated too decisively. After witnessing the Empire take several decisive victories in Dacia, the Entente, and the Rhine front during the first months of the Great War, the Commonwealth began to share covertly provide intelligence and volunteer forces. The occurrence of Operation Revolving Door, which caused the utter rout of the Republican army and the occupation of the Republic's core territory saw the start of more overt support. First, the Commonwealth deployed her navy and mage corps to safeguard the Free Republican navy and forces during their redeployment to the southern continent before subsequently allying with the Republican exiles as an official belligerent against the Empire.

Russy Federation (ルーシー連邦) - Due to conflicting ideologies, the Russian Federation and the Allied Kingdom had a strained and hostile disposition toward one another. However, after the initiation of hostilities against the Empire by both nations, the two established diplomatic ties and subsequently began assisting one another through the exchanging of arrested spies and the establishment of Arctic convoys. After the failure of the first strategic attack by the Federation, the Commonwealth provided substantial war support through the sending of weapons, material supplies, and an expeditionary force.

Army
The Army of Commonwealth is relatively weak compared to its navy. When Operation Revolving Door was performed, the Commonwealth could only muster 7 infantry divisions and 1 cavalry division for deployment to the continent; which was a drop in the bucket compared to the Empire or the Republic.

By 1926, wartime conscription had greatly strengthened the overall size and power of the Commonwealth's ground forces. Based on the information gathered by Imperial Intelligence, the Commonwealth had trained and equipped an estimated 50 divisions.

Aerial mages serve as both a flexible rapid reaction and fire support branch working jointly with other branches of the army. The mage corps also serve as both an operational reserve force for intercepting enemy mages, ground formations, and naval unit as well as an offensive shock force to puncture enemy formations and defencses.

Navy
They have large amounts of heavy and long-ranged battleships, containing some super-dreadnoughts. They have more advanced and powerful mechanized ships than the Empire. The tactics of their naval mages are the most sophisticated in the world with unique abilities; such as the capability to deploy attack squadrons from submarines, forming boarding parties to assault enemy warships, and provide accurate close air support for marines. Even individual Commonwealth marine mages are formidable combatants and are considered elite amongst both adversaries and allies. The Commonwealth Navy is organized into a number of distinct fleets. Some notable formations are the Home Fleet, the Inner Sea Fleet, the Outer Sea Fleets, the Norden blockade fleet.

Airforce
The Commonwealth air force is an established military force with high morale, rigorous training, and advanced equipment. The result is a capable force that is to be one to be reckoned with, and this is shown through their performance in combating the Imperial air force over Dodobird Channel. All pilots of the Commonwealth are select, highly-trained personnel.

Intelligence
Commonwealth is one of the few countries known to utilize an organized intelligence service with both conventional and confidential branches to gather knowledge regarding the deployment, disposition, readiness, and strategy of enemies. Reflective of the intelligence service's abilities is the broking of the Empire's highly encrypted communications system. This feat was accomplished by a section of Commonwealth intelligence code-named Ultra.

Trivia

 * On the maps that show up in the background of the anime, the country's name shows up as "Commonwealth" in a highly stylized font.
 * In the manga, the full name of Allied Kingdom is Allied Kingdom of Albion.
 * The Allied Kingdom is the anime version of the United Kingdom of Great Britain.
 * Commonwealth is a reference to the real world organization of nations that maintain strong ties with the UK.
 * The Commonwealths flag is a slightly altered version of the United Kingdom's.

Reference
Reino Aliado de Albión