Encouraged by England and the Netherlands, peace talks started again on 27 October 1705 between the kuruc leaders and the Emperor. However, military operations continued and both sides varied their strategy according to the military situation. On 13 December Kuruc forces led by János Bottyán defeated the Austrians at Szentgotthárd. One stumbling block was sovereignty over Transylvania – neither side was prepared to give it up. Rákóczi's proposed treaty with the French was stalled, so he became convinced that only a declaration of independence would make it acceptable for various powers to negotiate with him. In 1706, his wife (whom he had not seen in 5 years, along with their sons József and György) and his sister were both sent as peace ambassadors, but Rákóczi rejected their efforts on behalf of the Emperor.