Orcs (Middle-earth)

In Lord of the Rings
The Orcs origins are a mystery the most likely case is that they were once elves who were kidnapped by the First Dark Lord Morgoth and tortured by him and experimented on to due to Morgoths obsession to create life and bend it to his will. This filled them with rage and anger at their new forms and came under the service of Morgoth until his defeat at the War of Wrath were he was imprisoned in the void until the Dagor Dagorath.They then joined Morgoths first lieutenant Sauron who used Mordor as his fortress after this Sauron quickly began building his own forces and suceeded in bringing the downfall of Numenor and creating the Rings Of Power and the One Ring of Power eventually Sauron was defeated by an aliance between Elves and Men but the One Ring which Sauron had created was not destroyed thus keeping him alive this meant the Orcs would have to wait patiently until Sauron had enough power to strike Middle Earth again. In The Lord Of The Rings Sauron has returned though still weakened recalls his forces for his assault on ''Middle Earth. Saruman the wizard who serves Sauron breeds 100 Orcs of his own called The Urak Hai these Orcs are much stronger and powerful than normal Orcs they are sent after the Fellowship who mission it is to destroy The One Ring Of Power'' they fail to capture the ring but they kill Boromir and kidnap Merry and Pippin this particular group of Urak Hai are later killed by the rohirram. Sauron breeds 10.000 more Urak Hai but they are developed to quicly and not developed thus they are not as powerful as there predecessars they are sent by sauron to Helms Deep there they are killed. Eventually Saruman is defeated thus leading Sauron to send his Orc army of 600.000 upon Minas Tirith they almost suceed but are defeated by reinforcements. Aragorn decides to take on Saurons remaining 10.000 troops at the black gate were Sauron is finally defeated leaving his Orc army to scatter what happens to them afterwards is unkown