What are Marines and Soldiers allowed to take with them in service?

I'm just wondering about what personal items our women and men are allowed to take into BCT,SOI or MCT(or any other training),or on base, then Overseas to the middle east.im only wondering becausei recently read about a soldier whos ipod stopped a bullet. what i want to know is what you are allowed to take... show more I'm just wondering about what personal items our women and men are allowed to take into BCT,SOI or MCT(or any other training),or on base, then Overseas to the middle east.im only wondering becausei recently read about a soldier whos ipod stopped a bullet.
what i want to know is what you are allowed to take for the


Marines
Army
Navy
Airforce
Coast guard


im not saying just when fighting but at all times away from home.anything that has all the branches (doesnt have to have them all) and some sources and other lists of things you can take.
thanks everyone
Update: ive been told that.
Update 2: yea answerer number 2 is easier to understand but answerer number has more items so ill leave it to voting
Update 3: the second answerer i mentioned is number 3
4 answers 4