In 1368 Ilsfeld became the property of Württemberg; by about 1460 it had become a fief of the Vogt or reeve of Lauffen am Neckar.
It was a border territory; to the north, Talheim had become the property of the Teutonic Knights, and beyond that lay for example Flein, which belonged to the Imperial City of Heilbronn, Stettenfels Castle, property of the Electorate of the Palatinate, and the County of Löwenstein.
In 1450, during Count Ulrich V's war against 30 Swabian Imperial Cities, Ilsfeld was attacked by Heilsbronn forces; the village was laid waste, with 40 people killed and 300 head of livestock removed.

In 1456 the Württembergischer Landgraben (Württemberg Ditch) was created as a border fortification running north of Ilsfeld, with a defensive tower, the Landturm, north of the hamlet of Wüstenhausen.
In 1460 the Battle of Wüstenhausen took place there, with Duke Ulrich defeating the forces of Frederick the Victorious, Elector Palatine.
The many battles in the 15th century are probably why Ilsfeld was surrounded by a high wall with ten towers.

Ilsfeld suffered greatly in the wars of the 16th and 17th centuries.
In 1519, Duke William IV of Bavaria quartered his army there; during the Thirty Years' War there were outbreaks of plague in 1626 and 1634 and Imperial troops were quartered there in 1638/39; and in 1645 it was plundered by French, Hessian and Weimar troops.
During the war the population shrank from about 1,200 to barely 100, and years after the war ended, many fields and vineyards were still abandoned.
Despite a large number of settlers from Austria and Switzerland, it took approximately a century for the settlement to recover.
During that time there were further quarterings of troops and required contributions.
Between 1672 and 1675, Brandenburg troops were several times quartered in Ilsfeld.
In 1693, during the War of the Palatine Succession, French troops used it as a base to attack Heilbronn.
In 1368 Ilsfeld became the property of Württemberg; by about 1460 it had become a fief of the Vogt or reeve of Lauffen am Neckar. It was a border territory; to the north, Talheim had become the property of the Teutonic Knights, and beyond that lay for example Flein, which belonged to the Imperial City of Heilbronn, Stettenfels Castle, property of the Electorate of the Palatinate, and the County of Löwenstein. In 1450, during Count Ulrich V's war against 30 Swabian Imperial Cities, Ilsfeld was attacked by Heilsbronn forces; the village was laid waste, with 40 people killed and 300 head of livestock removed.
In 1456 the Württembergischer Landgraben (Württemberg Ditch) was created as a border fortification running north of Ilsfeld, with a defensive tower, the Landturm, north of the hamlet of Wüstenhausen. In 1460 the Battle of Wüstenhausen took place there, with Duke Ulrich defeating the forces of Frederick the Victorious, Elector Palatine. The many battles in the 15th century are probably why Ilsfeld was surrounded by a high wall with ten towers.
Ilsfeld suffered greatly in the wars of the 16th and 17th centuries. In 1519, Duke William IV of Bavaria quartered his army there; during the Thirty Years' War there were outbreaks of plague in 1626 and 1634 and Imperial troops were quartered there in 1638/39; and in 1645 it was plundered by French, Hessian and Weimar troops. During the war the population shrank from about 1,200 to barely 100, and years after the war ended, many fields and vineyards were still abandoned. Despite a large number of settlers from Austria and Switzerland, it took approximately a century for the settlement to recover. During that time there were further quarterings of troops and required contributions. Between 1672 and 1675, Brandenburg troops were several times quartered in Ilsfeld. In 1693, during the War of the Palatine Succession, French troops used it as a base to attack Heilbronn.
Ilsfeld