Just a small remark: AI is really bad at transporting its Units from Europe to the Colonies. It simply does not buy enough Ships and also it does not prioritize very wisely which Units to transport first. This is basically still a remainder of poor Vanilla AI transportation logic. (Game Concepts like Europe - not known in Civ4BTS - have often been implemented quite poorly considering AI logic.) Edit: @devolution had at least added code so AI ships in Europe load the most valuable Units first. So it is much better than the poor Vanilla Europe transportation logic "first in - first out". But it AI is still not considering which Units it might need strategically. But currently @devolution is working on AI improvements and maybe he will take a look at this as well. (I posted a suggestion in our internal forum and if I am correct at least an improvement considering "prioritizing Settlers" should be easy to implement.) ------ There would have been other easy ways to "improve AI transportation from Europe" by simply giving AI more transportation capacity, e.g. giving AI a free 2nd ships (after e.g. 30 turns) by an AI cheat giving all Colonial player a second ship as additional Starting Unit by simple XML balancing change But both of these solutions I did not really like.