Just to say "all of them" might be accurate but wouldn't be greatly informative. I have tried to divide all of history into the seperate chunks of it where we have a gaming interest, but inevitably there will be some overlaps. (And probably some periods left out - just deal with it, okay!)
The Essex Home Guard are a small band of wargamers who meet up on a semi-regular basis to fight tabletop battles with toy soldiers. The figures are usually but not exclusively 25-30mm in size and the periods of interest span from the Bronze Age to the 20th Century.