Senate missions are usually pretty easy for me, take this settlement, blockade that settlement, aqquire trade rights with this faction, yada yada yada. However, when ever I seem to be doing good, the Senate goes and throws an impossible assignment at me. Recently in my Brutii campaign I was mopping up the Macedonians when the Senate told me to blockade Thessalonca. Fair enough, I said so I sailed my fleet of Triremes up the Aegean, and find that the Thessalonca port is being blocked off by 3 Senate Biremes! I couldn't get through to blockade it. So I moved back to let the Senate ships out. They never moved, I failed the mission, and the Senate told me to do it again 3 years later, which I also failed. Really annoying.