I'm not sure if it's a time-line, it's more of a time-bucket. It's a multi-period show where the Ancient Greeks will be camped next to the 19th Century Samurai, next to the WW2 Spitfire, next to the Saxons. There may be a logic in the layout, but I haven't noticed it myself.

http://www.military-odyssey.fsnet.co.uk/mo/mo-f.html