I noticed several times that especially colonial wars can go on forever.
Germany had a war against one of the coastal African states for 10+ years, and never even invaded them one bit.
The US had a war against the Netherlands over Hawaii, France joined the dutch, and its also a zero-battle, zero-warsocre war for 10+ years.
Once I also had the "fortune" to get into such a war against GP, with Russia being the war leader of my side. A few occupations is all that has happened. No troop movement in many years. No peace in sight
What up with that?