Military Buttons???

[NorthCentral MN TreasureSeeker]

Hi everyone,
I have 3 buttons to show & I was wondering if they were all of military origin. The first one I'm assuming is a post WWI variety. It was found within 1/2 mile from one of Roosevelt's old CC Camps.
The other 2 I am not sure of. They are raised buttons for use on coats or jackets (something the military would need in Minnesota), with a tack like pin in the back to hold them to the material. They could just be decorative coat buttons, but I thought this fourm was a good place to make sure either way. If anyone has any info on them it would be appreciated. Thanks!

 

[Anonymous]

Details at this link:

http://images.google.com/imgres?imgurl=http://www.quanonline.com/military/military_reference/american/uniform_photos/wwi_mc_pants_fly_button.jpg&imgrefurl=http://www.quanonline.com/military/military_reference/american/wwi_mc_uniform.html&h=188&w=250&sz=25&tbnid=3Y-YUmE-vkWZhM:&tbnh=79&tbnw=106&hl=en&start=5&prev=/images%3Fq%3Dbuttons%2BWWI%2BUSa%26svnum%3D10%26hl%3Den%26lr%3D%26sa%3DG

 

[NorthCentral MN TreasureSeeker]

Thanks much Gabe! I've found 2 of these WWI buttons so far (must be fairly common). Don't know about the other 2 though. Yesterday I found a Navy button just a bit smaller than a half dollar. Shows an eagle holding onto an anchor, with 13 stars around the top. Can't make out what's printed on the back though. A friend told me it was from an officers coat. Maybe I'll post it later. Thanks again for the info!