This is kind of weird, and I think I’m just missing the obvious, but is this allowed?
Germany declares war on Russia turn two and takes Ukraine turn three.
Japan stays neutral to the West but attacks Russia and takes Yunnan. On turn two a Japanese bomber parks in Yunnan. On turn three Japan bombs Stalingrad and lands in German-controlled Ukraine.
Later on turn three, the UK wants to attack the poorly defended bomber in Ukraine with air units.
First of all, can Japan land in German-controlled territories (or Italian for that matter) as long as Japan is at war with the Soviets (and so is the European axis power)?
Second, does the UK have to declare war on Japan in order to attack a Japanese bomber in Ukraine? Not that it really matters anyway.