Racial Perceptions

That's about what I anticipated. I consider those very small numbers of European soldiers. There for a very brief period. Probably gringo tourists have had a greater genetic impact on Mexico.

Way more Mexicans volunteered for the left leaning Republicans during the Spanish Civil War against conserative Generalisimo Francisco Franco and his fascist Falange Party.

Did you know there are still Mexicans serving in the Spanish Foreigh Legion? I visited their museum in Ceuta, the tiny Spanish enclave on the north coast of Morocco, directly adjacent to Gibraltar and Algeciras.

I believe Mexicans are the largest single nationality to serve in the Spanish Foreign Legion. They saw duty in Ceuta, Melilla, Spanish Sahara, Spanish Equatorial Guinea... Quite a few died in the line of duty.

So. there has been a two way transatlantic exchange of genes between Iberia and the Amricas for five hundred years. Someone named it the Columbian exchange.

Yet, I think we would be hard pressed to isolate a visible Mexican genetic presence in Spain.