Complex sentence: However, the Silvan Elves distrust both the Dúnedain and the Noldor in particular; as a result they did not place their army under the supreme command of Gil-galad.
Split into simpler sentences: However, the Silvan Elves distrust both the Dúnedain and the Noldor in particular. As a result they do not place their army under the supreme command of Gil-galad.