They're not issued anymore. Most soldiers taking lighters to the field with them will bring disposable butane lighters. Quite a few do carry Zippos they purchase from the PX or BX. Still others, especially overseas, may purchase lighters of local manufacture. While stationed in Germany, I carried a truly windproof lighter that I traded with a German police officer for. It was battery operated and required no liquid or gas fuel.
Around WW2 when the US Army started to use them, consumer production stopped for a while so soldiers could get them.
You can't. That is the only reason for you to have a Zippo. If they let you carry a Zippo to school, they need to have their heads drilled for simples.
No, you can't. Diesel has much too high a flash point and won't ignite in a Zippo.
Absolutely not, you should only use Zippo Lighter fluid. If you're in a pinch, Ronson lighter fluid works too.
Not by the British Army, as they left Austria in 1955. The buildings are still standing and may be in use by the Austrian army.
Es ronsons is zippo brand to so yes it works great
Yes. The Army tuba players use sousaphones when marching.
Use can use any naptha lighter fluid in a Zippo. This may not be what you would identify as "normal," however; the more modern Bic lighter and many others use butane. Butane absolutely won't work in a Zippo. I'm not sure what would happen, but it could be anywhere from not working at all to a fiery explosion.
Ceremonial use only
In normal disposable lighters like bic it is butane gas, in Zippo lighters you can use most liquid that lights with a spark, but most people just use zippo brand naptha fuel.
The British Army use both the canteen and hydration packs
There are many different zippo tricks. I would recommend searching on Google, or Yahoo for Zippo Trick instructions. But remember be careful.