This envoy, Widu (衛頭) visited Early Jin with the help of Goguryeo.
In response to a question by Fu Jian, Widu stated that the name of country had changed (to Silla).
However, Silla acknowledges this because Goguryeo is needed to guard against Gaya-Japan Alliance.
Naemul's later reign was troubled by recurrent invasions by Wa Japan and the northern Malgal tribes.
This began with a massive Japanese incursion in 364, which was repulsed with great loss of life.