I am a % disabled veteran (with a retired/disabled military card). Do I need a visa or passport to go oversees? Also, what is the difference between the two?

Most foreign countries require a US Passport for you to enter and leave. So yes, you will need a passport. Some require a Visa for all, some waive them for tourists and short business trips

Americans Traveling Abroad (http://travel.state.gov/visa/americans/americans_1252.html)

I am a % disabled veteran (with a retired/disabled military card). Do I need a visa or passport to go oversees? Also, what is the difference between the two?
If you have government issued photo id (I used my drivers licences), you should have no problem getting into the US from Mexico if you walk across the border or drive across the border, I did it a week ago. My recommendation though, is to walk across the border, it only took me about 40 minutes to wait online, and only about 5 minutes to check my id (I also did not buy anything, so I did not need to worry about taxes).

If you fly or take a boat/cruise to Mexico you do need a passport.

A passport will be required to walk/drive across the Mexico border in 2008

I have used my California Id to visit tijuana but had to purchase a passport to fly into Mexico city. That was before my 100% from the air force. What I wanted to know is that now that I have a disabled veteran card would I be able to use it as a passport? My disabled veteran card gives me the same benefits that the retired vets card does retirees. Thanks for answering.

I just asked my husband for you hun (he's Active Duty) and he said only Active Duty ID's can take the place of a passport. :)