Complex sentence: Nidever took part in the battle of Pierre's Hole and in July 1832 he accompanied Joseph Reddford Walker to California in 1833, and remained there, joining George C. Yount in a sea otter hunt which had some success.
Split into simpler sentences: Nidever took part in the battle of Pierre's Hole. Remaining there, he joined George C. Yount in a sea otter hunt which had some success.