Fingon's Nirnaeth Arnoediad

[Maédhros]

In those days Maedhros son of Fëanor lifted up his heart, perceiving that Morgoth was not unassailable; for the deeds of Beren and Lúthien were sung in many songs throughout Beleriand. Yet Morgoth would destroy them all, one by one, if they could not again unite, and make new league and common council; and he began those counsels for the raising of the fortunes of the Eldar that are called the Union of Maedhros.

Fingon, being the High King of the Noldor, to me it seems as the logical person to begin drawing this Union of Elves against Morgoth. He could have probably have gathered more people against Melkor. I wonder why he didn't involved himself more and sent messangers to Orodreth to assail Morgoth.