Takamoto: "Father, an Ashigaru captain led a perfect assault on the Nagato castle. Shall we promote him?"
Motonari: "Eventually we will have a powerful navy, and we need extra generals to lead those fleets. Maybe this is a good start."



Note: There seems to be two kinds of promotion events. The first kind happens at the beginning of a season. The new general appears in the capital. The second kind happens immediately after a victorious land battle (naval battles never work for me) led by a non-general. The new general appears with the army that fought the battle. Both events are random. If we are in great need of new generals, we can satisfy the second condition in an auto-resolve battle. Simply repeat the auto-resolve battle until the promotion takes place.