Official State Mottoes from NETSTATE Mine? California - Eureka, I have found it! *I think it was the illegal aliens, from Mexico, that said that a couple of years ago. Why? Because we took California away from them when it became a part of the US as a result of the Treaty of Guadalupe Hidalgo signed on February 2, 1848 ending the Mexican American War. And NOW they are trying to take it back, by not leaving? They just don't get it! We won! We get to keep it!