I picked up a slim brochure while visiting the Library of Congress, which describes an exhibit at the National Portrait Gallery in Washington through Feb. 10. There's an online tour at link below. I am mentioning it here because I haven't seen any other publicity on it and someone interested in this subject area might miss it.
From the official brochure:
"The portraits, maps, documents, and treaties in this exhibition illustrate moments of significant political and economic intersection between Spain and the United States. “Legacy” highlights the crucial Spanish contributions to the American cause during the Revolutionary War; details the subsequent diplomatic relationships focused on territorial rights and boundaries; and reveals the presence and influence of Hispanic culture in Florida, Louisiana, California, and the Southwest in the formative and early years of the American republic."
To Join the Company of Military Historians click here