Episode 06 The 48ers

In 1849,..the discovery of gold created a massive migration of people to San Francisco, CA..and history remembers those people as,..the 49ers,..In 1848,..Rebellions in Europe created a massive migration of people to San Antonio,..TX,..and,..history would also remember them. Question: Who were these people who migrated to Texas from Europe and later came to be known as,..the 48ers?