While researching the history of the Taaffe family (see also this question) I realized that a lot of the information about it in the wikipedia comes from a 1833 English noble almanach. Among other interesting facts this book also says that the 6th Viscout Taaffe, an Austrian general
achieved great renown during the war with the Turks, in 1738, and achieved the victory of Belgrade with high honour.
Since I could not readily recall a Battle of Belgrade, 1738, I consulted wikipedia and this is what I found:
In July 1737, Austria entered the war against Ottoman Empire, but was defeated a number of times, among others in the Battle of Banja Luka on August 4, 1737, Battle of Grocka at 18, 21–22 July 1739, and then lost Belgrade after an Ottoman siege from July 18 to September 1739.
Something is fishy here, isn't it? Are we witnessing a 1833 spin on the events of 1738 or was there an Austrian success at Belgrade that got left out of the wiki entry on the Austro-Russian–Turkish War (1735–39)?
UPDT: Yannis's link to the DBN does clear up things:
He was given the command of a brigade in the main army under Wallis, and distinguished himself in the operations round Belgrade.
Looks like the 1833 book did over-enthuse for no good reason. I'll guess I'll stop here and forego a proper Quellenforschung at this stage.