Okay kiddo, let me explain to you what is Reconquista (Mexico).
Reconquista is a word that means "reconquest" in Spanish. It refers to the idea that some people believe they have the right to take back what was once theirs, in this case, Mexicans think they should take back land that was taken from them by the United States during the 19th century.
To understand the Reconquista idea, we have to go back in time to when Mexico was once a much bigger country that included California, Texas, and other places that are now part of the United States. In the mid-19th century, the United States defeated Mexico in a war and gained control of a lot of its land.
Fast forward to now, the Reconquista idea is not a formal movement by the Mexican government, and not all Mexicans support it. However, some people believe that Mexicans should take back what was once theirs because they see the U.S. as an oppressor and believe that the land was taken unjustly.
But it’s important to remember that this is a controversial topic and not everyone agrees with it. The relationship between Mexico and the US is complex and both countries need to work together for the benefit of their citizens.