Well guess what? We now have an awesome Timeline for all the major events in Valkyria Chronicles series. Unfortunately, the disadvantage this timeline is it was created using Dipity and then embedded on our wiki. So there is no easy way to edit it without having to make an account on Dipity.
Currently, everyone with a Dipity account can add events to the timeline but only me can edit or delete them. If you wish to contribute more, e.g. write description text, add images, please contact me on my talk page or comment here.