@stroutqb22:
Say Russia is at war with Japan, but not Italy and Germany. If somehow Germany or Italy got a plane into a Japanese territory and Russia wants to attack that territory what would they do with the German/Italian aircraft?
Russia CAN’T attack that territory unless she declares war on Germany/Italy.
If it’s not round 4 yet and Russia is not already at war with Germany/Italy, then Russia can’t make this declaration of war, which means it is impossible for Russia to attack this territory.
It is only at sea that you can ignore the units of powers with which you are not yet at war.
On land, you are not allowed to attack unless you are at war with all of the powers owning units in that territory.
Rulebook says:
“A power can’t attack a territory controlled by or containing units belonging to a power with which it is not at war.”