It's not surprising that tank crew of WW1 (or any period really) are seen wearing as little additional equipment as possible - in the case of British WW1 Tank crew little more than a belt with a pistol and ammunition pouch, as well as anti-gas protection. I'd have thought the men must have taken theirĀ haversacks with them (with personal kit including knife fork and spoon, any extra food, socks, cleaning equipment, etc etc), or the larger packs which could carry blankets/greatcoats too - is there any proof of this? I'd imagine there must be a designated space for them if possible in the cramped interior. Also, did they bring water bottles with them or was there a water tank already inside for the use of the crew?