Just a note Charlie has 7 cities, only 6 are visible. The 7th is the city of Ulm, and must be located below his visible Maceman, to have that Cultural push on the Portuguese. Further scouting would be required, and taking the City of Ulm 1st, would give us a great starting point, and ready access to take out his Iron with a couple of Suicide horse archers. Good invasion plan, but scout out that last city, and revise it to include that city. I disagree on Charlie attacking Toledo, I think he'd go for Cordoba. Its closer to his lands, coastal, so not as much Cultural Pressure, can be reached in 2 turns and would end up with a minimal garrison. He has roads connecting it to his lands, and is at on extreme of our empire. I'd even go as far as to consider a 2 pronged attack, 1st along the line suggested, with Ulm added into the mix/calculations, and the 2nd attacking from the North into Mainz and then moving on to the capital in Vienna, his 2nd settled city. Charlie is rapidly industrialising the area around the city with Mines and farms going up, finishing up with Augsburg. The other factor we need to consider is the stack Van Orange has sitting in his northern city of Maastricht of which he can declare war at Pleased (20%) but only bribed at Cautious? Even so, moving all our troops away, could give him a green light to attack as he's please with Charlie as well, and may take our attack as a reason to dog pile us..