In October 1664, de Souches was appointed Governor of Komárom, an important town on the modern Slovakian/Hungarian border, and spent the next few years supervising the construction of new fortifications there, as well as other towns in the region. He also became a member of the Hofkriegsrat, or Imperial War Council, although his duties were largely nominal. When Austria entered the Franco-Dutch War in 1673 as an ally of the Dutch Republic and Spain, he was appointed commander of Imperial troops in the Low Countries and took part in the Battle of Seneffe in August 1674. The Imperial troops suffered minimal casualties in what was the bloodiest battle of the war and his Allies subsequently claimed de Souches had ignored requests for support. One suggestion is he did so under instructions from Emperor Leopold, who wanted to conserve resources for the Rhineland campaign, which he viewed as having far greater strategic significance.
