Apparently the message board has stopped sending me emails when someone posts to the thread. Otherwise, I would have mentioned this sooner. It's a topic dear to my heart -- well, as people say -- in fact there was a militia in Lauderdale County prior to the Civil War. If memory serves it was organized around 1842 (+/- a year or two). My great, great, grandfather William H. White had the honor to serve as a Captain of one of the companies (Co. F?, maybe) and his grave stone bears the inscription "Cap'n Billy" -- but enough about me! :-)
The state fielded two regiments for the Mexican war. A company of the second regiment was raised in Lauderdale County and, although they were not actually engaged, they did leave the county and report to several location in the field.
I may be able to find some actual dates and names when I can get back into the research material. I thought the name Durr was vaguely familiar -- is there a "James" in your ancestory in Lauderdale County about this period?