Wilhelm Reinhard von Neipperg (27 May 1684 – 26 May 1774) was an aristocrat (count) and general, who held several commanding posts in military forces of the Habsburg Monarchy.
After fighting against the Turks, he renounced his military career in order to attend to the education of Prince Francis of Lorraine, the future Holy Roman Emperor.
On 1 September, Neipperg agreed to signe a preliminary peace agreement with the Ottomans, and dispatched the news to the Emperor on the next day.
On 5 September, the Emperor sent another letter to Neipperg, informing him of the end of his diplomatic mission, while still not knowing that the preliminary treaty was already signed.
Only upon return to Belgrade from the Grand Vizier's camp, Neipperg became aware of those new instructions and consequent decisions, realizing that he acted without valid negotiating powers, but it was to late for reversal.