Complex sentence: Shortly thereafter, Napier received promotion to Post-captain and appointment to command of "Jason", but remained with "Recruit" for a few more months, participating in the defeat of a French reinforcement squadron in April.
Split into simpler sentences: Shortly thereafter, Napier received promotion to Post-captain and appointment to command of "Jason", but remained with "Recruit" for a few more months. ' "Recruit" participated in the defeat of a French reinforcement squadron in April.