Kay Bell published her 53rd Carnival of Taxes with a "Cinco de Mayo" theme. My post on IRS tips for handling an audit from a week ago is included along with the usual many other good posts. The link to the carnival is given above.
 The link in the title gives a history of the Mexican victory over French forces in 1862. Cinco de Mayo is somewhat comparable to the American War of 1812--it did not provide independence to Mexico as such (this happened in 1810) but assured that Mexico would remain independent. The article points out that Cinco de Mayo is a bigger deal for American Hispanics than for Mexicans (and probably bigger yet for importers of Mexican beers!).