So, I was moving my ships around on with an offensive fire stance (not aggressive) and it opened fire and I automatically declared war.
It reads: "start bombarding enemy armies in range, even if the execution of other orders has to be deferred."
It was against a player who went inactive, who had a trade embargo against me, but I put him on peace, so my relation with him was PEACE. I even had artilary also in range of some other lands of him, (also on offensive fire stance) yet my ships opened fire, where my land armies did not.
Fix please!