Who could have thought that! I'm now playing the Danish on expert and the clock struck 1206. My empire takes basically all of HRE and the French lands. In the south I border on a strip of Italy-held provinces starting from Aquitaine eastward to Venice. A dozen years ago the Italians got excommed (for attacking both Papacy and the Spanish). I craved to get access to Mediterranean, but I was reluctant to start a war, firstly because the Italians always agreed to my marital proposals (both male and female), and secondly, because of their ramified fleet network. But I decided to act underhanded and bribed a small contingent of 2 units in Genoa. They went over to me, so I got the province without an arrow loosened. But next year I get a message from the Byz (the Italians' only ally) that they choose to stay with them in our war!!! Thus never killing a single Italian soldier, nor sinking a single Italian ship I found myself at war with a ship-strong nation!! Outrageous!!
Do not repeat my mistake: bribing IS war!!