The Conflict between Rohan and Isengard
The Lord of the RingsRohan faces the threat of Saruman's forces, leading to the Battle of Helm's Deep.
increasing
Bearing strength in each event
decreasing
The Threat from Isengard

The Threat from Isengard
The Raids on Rohan
Saruman's Orcs and Dunlendings raid Rohan, burning villages and killing people. The Rohirrim are forced to defend their borders.
The Weakening of Rohan
Théoden is under the spell of Gríma Wormtongue, who serves Saruman. The king is aged and inactive, and the land is vulnerable.
The Gathering Storm
Saruman prepares a large army to crush Rohan. The Rohirrim must muster their strength.
The Battle of Helm's Deep

The Battle of Helm's Deep
The Siege of the Hornburg
Saruman's army attacks Helm's Deep, overwhelming the defenders. The Rohirrim are outnumbered and nearly defeated.
The Arrival of Gandalf
Gandalf brings reinforcements at dawn, turning the tide. The Ents also attack Isengard, dividing Saruman's forces.
The Victory
The Rohirrim win a decisive victory. Saruman's army is destroyed, and the threat to Rohan is ended.
The Aftermath in Rohan

The Aftermath in Rohan
The Healing of the King
Théoden is restored to health and leads his people. The land begins to recover from the war.
The Alliance with Gondor
Rohan renews its alliance with Gondor, and the Rohirrim ride to the aid of Minas Tirith.
The Peace of the Mark
After the war, Rohan enjoys peace under King Éomer. The memory of the battle is honored.
T.A. 3018–3019
March 3–4, T.A. 3019
After the Battle of Helm's Deep