I am going to make a point here to say that the US Military does not in any way HAVE to accommodate Indian or other Far eastern religions, or most others for that matter, in order for those of those religious persuasions that wish to join and serve. The reason being that none that I am aware including the Sikh religion require these items if you are in military service or there are severe extenuating circumstances such as working in an environment where such accoutrements which would be mandatory can temporarily set aside until such duties are concluded. I know this from personal experience in dealing with a multitude of nationalities and even more religious persuasions in my crews while I was overseas in the sandbox. In particular I relate an incident which coincidently involved those of the Sikh persuasion. My convoys regularly ran routes in active sectors of Iraq where attack could and did occur with frequency. Therefor I maintained a policy of wearing flack jackets, eyepro and helmets. It took me a lot of badgering, threatening and theft to accumulate enough protective equipment for my crews, and I was going to be damned it they weren't going to use it A. B, I wanted them to have the equipment on to significantly up their chances for survival in case they were hit hard. C and most important and best reason was if the hit was minor to medium, but shattered windscreens or got through the gaps in the curtain armor then hopefully with the extra protection it was help enough that they could maintain some control of their vehicle to mitigate the potential of an accident from a disabled driver and save their own lives and most importantly enable the part of the convoy BEHIND them to be able to pass the strike zone safely. Basically I was stacking the deck in favor of my convoy as much as possible against strikes. Anyhow as I said I had many nationalities and religious persuasions in my crews. Early on after I had scrounged up the protective equipment I had some new drivers attached to my crew, a couple of them were younger Sikhs just in from India. So I and my Indian translator started going over what they needed to do what they needed to have on while driving ect. Well the young studs had a problem with wearing the helmets. I got the biggest I could because they would fit most everyone I would be likely to get. Well the helmets didn't fit over their turbans, and they weren't going to wear them on their turbans anyhow. It was some religious thing, not sure what as I didn't get into it with them. My Indian translator did. And boy howdy did he. We called him Santa Claus well cause that's what the old boy looked like and had a similar personality very funny and jolly and smiling all the time. I enjoyed working with him. Real nice guy. He didn't speak too much English and I didn't speak much Indian but we had a working pidgin going that got our points across. Anyhow he laid into those young studs like they had done violated one of his daughters honor. I don't know exactly what he said, but the result was complete cooperation including wearing the helmets without the turban. That was the most memorable little thing I had with dealing with religion except for the one were I had my Egyptian and Muslim friend and crew member stop to pray one time in a hot zone on his first run. (and the last, he got read the riot act). Anyhow I have a pretty broad exposure to religions and conditions that do not permit doing everything prescribed. As I said before almost all make allowances for the fact that the world wont cooperate at times. It might be nice to accommodate in peacetime, but during wartime or emergencies it is not necessary.
PS My friend Santa Claus unfortunately died in a attack on his convoy about a year after I left theater. Its sad that such a fine fellow had to end his time in this mortal world in such fashion. I miss our tea times and his company.