Things of Middle-earth
Last Alliance of Elves and Men
The league made at the end of the Second Age between Gil-galad and Elendil to defeat Sauron in the War of the Last Alliance:
The Last Alliance of Elves and Men is formed.
The Return of the King, LoTR Appendix B, The Tale of Years: The Second Age
Now Elendil and Gil-galad took counsel together, for they perceived that Sauron would grow too strong and would overcome all his enemies one by one, if they did not unite against him. Therefore they made that League which is called the Last Alliance, and they marched east... gathering a great host of Elves and Men....
The Silmarillion, Of the Rings of Power and the Third Age
Contributors: Elena Tiriel 5Dec07