[3] At the beginning of 1673, together with John Maurice, Ayvla successfully fought the Munster troops of the Count of Lippe, among others near Staphorst in a fierce encounter; an attack against Zwartsluis in July of the same year, under the same commanders, failed.

The troops of the Bishop made every effort to overrun Heerenveen, but they were stopped every time and could do nothing but plunder the defenceless countrymen, until on 1 September they were forced to retreat, without having accomplished anything of importance.

[3] When the front shifted from the Dutch Republic to the Spanish Netherlands, Ayvla took part, on 11 August 1674, in the Battle of Seneffe, leading the infantry of the right wing, on which occasion he was severely wounded.

[2] Following the outbreak of the Nine Years War, he commanded a small Dutch army that took part in early operations around Cologne, where he co-operated with German forces under Hans Adam von Schöning.

He was part of the large infantry square, which, although under attack from a superior force, stood its ground heroically, so that the Duke of Luxembourg, the French commander, discouraged by the many fruitless attempts to penetrate, finally held back and had to see nine regiments, led by the Count of Waldeck and Aylva, calmly retreat over the heights of Mellé to the side of Nivelles.

When he was on the hunt, his horse reared up and threw his rider to the ground; he hurt his head, which at first was thought to be of little importance, but subsequently caused him a fever, with such seizures that he died a few days later.