For something like this, you have to consider whether the name is confusing to the customer or not. You can't, for instance, name your new pocketknife a "US Army knife". You could, however, name your new video game "US Army VS the Martians!" because that would be a reasonable use that would not confuse anyone.
If your iPhone App is not a game or history program or such like then think about what your product is. You cannot try to pretend it is an army product.
You cannot use any other company's registered trademark without their permission, even on an iPhone app. You should consult a trademark lawyer. Asking permission to use someone else's trademark isn't hard, however, there is no guarantee they will grant it.
Also dealing with the US Army may involve more red tape because they have protocols and an image to protect. Others who own a trademark may allow you to use their registered mark for a licensing fee which could put a damper on your iPhone profitability.
Yes as "alianswers" said, it is recommend you consult a licensed trademark attorney first. Frequently Asked Questions about Trademarks here: trademarkia.com/faqs/index.aspx.
Firstly, the actual name is "United States Army" or "U.S. Army" for short. Perhaps removing the periods as you have done is enough. Second, a copyright is for "original works of authorship" not of names.
Copyright is for things that are actually produced. If you are concerned about using the name of another entity, you must look into trademark issues. The "U.S. Army" has registered their logo, which includes the words as a trademark.
However, when registering a trademark for a logo, you are protecting the design, styling, etc. Of the words, not the words themselves. The U.S. Army has not registered the color of their logo as part of the trademark. Also, I'm not sure the name U.S. Army has been or even can be trademarked, since it is a government agency.
(You would need to look into that) You can find the details of the trademark here: tess2.uspto.gov/ With that said, a trademark is connected with the services offered by that entity. "A trademark is a word, name, symbol, or device that is used in trade with goods to indicate the source of the goods and to distinguish them from the goods of others." You should be able to utilize the name of the U.S. Army in your app since you are not competing for the same goods and services.
For instance, if I have an app titled, "U.S. Army Recruitment Office Locator," you should be fine. The easiest thing to do is call a local trademark attorney and get some advice. They will probably have a quick answer over the phone and you won't need a consultation.
Use Canadian Armed Force instead , it,s much better ;-).
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.