When the rocket broke through the clouds, it was caught by all the surveillance satellites that were keeping an eye on Eden.
If it weren't for the rocket being too big to be considered a missile—its size rivaled the Saturn V rocket that sent astronauts to the moon—the observers would have thought that Eden was attacking them. After all, they hadn't made any announcements before launching the rocket after having been denied permission by the ITU.
Although many countries used their diplomatic channels to complain about the launch, Eden maintained that the rocket never violated any nation's airspace before entering space, so there was no need for them to inform anyone. They also took the opportunity to inform those nations that there would be more than a few launches in the following days, so they shouldn't complain that they hadn't been informed in advance again.