You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
alternatehistory.com
What would happen if Mexico declared war on the CSA during the US civil war to retake territory lost during the Mexican-American war? Did they have the resources and motivation to do this, and force some sort of settlement on the distracted United States?
One obvious obstacle is that in OTL Mexico was at war with France during this period. Could they somehow manage to avoid that? How bad was their balance of payments?