Right - I'm curious! Most of the research I'm doing hinges on reconstructions (computer) of archaeological sites/artefacts, and I'm interested as to WHY you like to re-enact, military or otherwise. There are a great many challenges in attempting to portray past events/places, not least the level of detail and the accuracy of sources required, and I was also wondering how you feel about the re-enactions you do - how and why are they historically "valid"? Do you aim to be realistic, or is it the spirit of the thing that matters?