War of Wrath
After the recovery of the Silmaril by Beren and Lúthien, many people of Middle-earth sought to possess it, and there were wars between the Sindar, the Noldor and the Dwarves, in which the Sindar were defeated. The Silmaril was taken by Eärendil, who sailed to Valinor with it and persuaded the Valar to make war on Morgoth, which led to the latter's defeat in the War of Wrath.