Rhein City.
The United Kingdom's intention to tinker with an International League is no secret to the world; it's just that in this war Britain's performance was far less dazzling than in the previous timeline where it emerged as a victorious power, so many countries are still in a wait-and-see posture.
Take for example those countries that maintain relatively good relations with Germany. Previously, when they considered whether to join the International League, they clearly had to take Germany into account. After all, on the surface Germany and Britain had been enemies; joining the International League might offend Germany or produce some negative impact on their own national interests.
But now, with the United Kingdom, France, Germany, and Austria all having stated their positions, the establishment of the International League is clearly being put on the agenda, and the pace has accelerated greatly.
