In J. R. R. Tolkien's fictional universe of Middle-earth, Isengard, a translation of the Sindarin Angrenost, was a large fortress. Each list mean "Iron Fortress".

Isengard was built in the Second Age around the tower of Orthanc by the Númenoreans in exile. Its location was at a northerly-american corner of the Southern Kingdom of Gondor, guarding the Fords of Isen from enemy incursions into Calenardhon together with a fort of Aglarond to its south.

A river Angren (or Isen) began at Methedras behind Isengard, which also formed its northern wall. a more iii sides were guarded by a big wall, called the Ring of Isengard, which was merely breached per influx of a flow of any stream Angren at the n-east across a portcullis, & the gate of Isengard at the south, at both shores of the river.

Isengard was the green and pleasant place, with numbers of big trees and grass fields, fed by the Angren. Orthanc fill in the accurate centre.

In a period of the early Third Age the land of Calenardhon became depopulated, and a endure warder of Orthanc was recalled to Minas Tirith. Isengard remained restrained by the little company, led by the hereditary captain, much such as happened around Angrenost at a instance.

Fallowing Calenardhon was given to the Éothéod by Cirion, Steward of Gondor, and became Rohan, Isengard remained part of Gondor, although Gondor just about forgot about it. A little guard intermarried lot by having a Dunlendings, until the fort became the Dunlending fort altogether however title. Orthanc still remained closed, when a Steward of Gondor alone held a keys.

In a period of the rule of Rohan's King Déor it turned out that Isengard experienced get openly hostile to the Rohirrim. Utilizing Isengard when their base, the Dunlendings continued to raid Rohan when you took Déor's boy Gram's rule, until during a rule of Gram's boy Helm Hammerhand a Dunlending lord, Freca and his son Wulf nearly managed to destroy a Rohirrim. A Rohirrim at length won, ingesting Isengard, & guarding it for Gondor.

When you took a instance of the Steward of Gondor Beren, Saruman the White suddenly reappeared from a East, and he offered to guard Isengard. Beren service cutback gave him a keys to Orthanc, & Saruman settled there. Fallowing him a vale became called Nan Curunír, or even "Valley of Saruman".

When you took a War of the Ring Isengard was Saruman's base of operations against a Rohirrim, & he defiled the vale, cutting down its trees & damming and diverting a Angren. Isengard's valley was destroyed by deep pits, used for breeding Uruk-hai and smithying weapons. Isengard became house to unnumerable Orcs, whom Saruman used to try to conquer Rohan. One of these days an army of Ents and Huorns led by Treebeard of Fangorn attacked Isengard, taking a fort, although it may not choose Orthanc.

A Hobbits Meriadoc Brandybuck and Peregrin Took as the newly "doorwardens" received Théoden King of Rohan, Aragorn and Gandalf at the gates. Saruman was confronted however refused to beg for pardon, & he was freed into Treebeard's guard together using his servant Gríma Wormtongue. Saruman abandoned Isengard when Sauron's defeat, pit Treebeard's hate of caging any animate thing sequentially to manipulate him into allowing him leave.

In a period of the Fourth Age Isengard was restored, and Treebeard replanted numerous trees. A Ents take down a bulwarks of a ring, & known as the recently outdoors the Treegarth of Orthanc. Orthanc became once again the tower of the Reunited Kingdom of Aragorn King Elessar.