I have located 66 datacrons for each of the factions. I don't know where the 67th achievement point comes from yet. I still have to obtain the last 2 datacrons on my first 50. I suspect that the 67th achievement will be for getting all of the 66 datacrons. To answer your question, yes, there are some galactic history entries that you will not have because the datacrons that award those entries are on planets inaccessible to your faction. For example, GH 01, 02 and 03 are on Hutta, and republic players are not allowed to go there. I have found a total of Galactic Histories 01 - 87. I don't yet know if there are any beyond 87. I think you'll just have to roll toons on both sides to get the whole story. I'm working on post my list to my web site with links to good guides for obtaining all the datacrons for each faction. Keep an eye out for it. It should be in the next few days or even a couple of weeks, but soon. -Speedy