November 11 is Veterans Day. It was original marked as the last day of World War 1 but the tradition continues today to support troops from all wars here in the United States.
Some restaurants honor Veterans Day by providing discounted and free meals.
The people at Military.com have a list of places where veterans can eat free on Veterans Day.
How to prove you're a veteran
To accept your free meal, you may need to prove you're a veteran.
A few ways you can prove you were in the military from Military.com :
Retiree or Military ID Card
VA Benefits Card
Veterans ID Card
DD-214 documents
State ID w/ Veteran designation (which is available on some states including Washington State)
Restaurants that offer free food options on Veterans Day
From the list on Military.com, here's a l

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