Alex Cox says on the commentary of the Criterion Collection DVD that, out all the movies he's done, and despite the fact that this film had hurt his career as a Hollywood director, he believes that Walker (1987) is his best work.
According to the video Easter egg that can be found on the Criterion Collection DVD, when Alex Cox, Rudy Wurlitzer, and Lorenzo O'Brien first conceived the idea of Walker, they wanted to make a popular audience movie in the vein of Blazing Saddles (1974). But when they finished, Universal Pictures felt that it was too much of an art film and decided to shelve it. It would be 20 years before the film saw the light of day on DVD.
The movie's Walker (1987) title refers to the film's central character, the historical figure of William Walker (1824 - 1860), who is portrayed in the film by actor Ed Harris. Website Wikipedia says of William Walker that he was " . . . an American physician, lawyer, journalist and mercenary, who organized several private military expeditions into Latin America, with the intention of establishing English-speaking colonies under his personal control, an enterprise then known as 'filibustering'. Walker usurped the presidency of the Republic of Nicaragua in 1856 and ruled until 1857, when he was defeated by a coalition of Central American armies. He was executed by the government of Honduras in 1860".