Azur Lane: The Defenders Of The Skies And Space

The Strategic Aerospace Defense Force is a branch of the armed forces of the Republic of Bacopa, an island nation devastated by a three-sided civil war. The defense force is the only unit in the nation's military that has both air and space capabilities, being able to mostly intercept ballistic missiles and launch military satellites in space.

Due to the war, the SADF has been split into two factions. One loyal to the government, and one loyal to the northern secessionist militias, crippling the brigade's abilities.

One day, while attempting to intercept a Chinese frigate that has entered northern waters, the brigade's faction, led by troops loyal to the autonomists, disappears into thin air, only to reappear in the middle of some island in the alternate WW2 universe known as Azur Lane.

With no way of returning to their own universe, the brigade's troops decide to reside in this world while trying to maintain some level of neutrality to avoid changing the course of history. This will prove much harder as it seems, when some of the troops are still faithful to their secessionist ideals and some others wish to modernize the navies of this mysterious universe by exporting their missiles and technologies to either side.