05-15-2012, 02:15 PM
It's an Army National Guard Patch of Florida.
"Worn from: 17 June 1948 - Current.
The design of the insignia reflects the early history of Florida. The white trace outline is that of "Castillo de San Marcos, " a masonry fort (begun in 1672) built by the Spanish to protect Saint Augustine. Founded in 1565, Saint Augustine was the first permanent European settlement in the continental United States."
Source:
http://www.vetshome.com/army_national_guard_patches_his_1.htm
Christoph