BANNER     [unit] "message"                     time: 0 days    priority: 1

Provide a short message describing something about the unit. The message will appear after the unit in the turn report.

If a unit number is specified, the given unit's banner will be changed. This is useful for setting banners on entities which don't execute orders directly, such as ships and castles. Banners may not be set for units controlled by another player.

Example:

> banner "carrying a gold standard"
> banner 2019 "carrying a gold standard"

Seen here:
   Fighters of Pelenth [2019], "carrying a gold standard"

The message should be limited to 50 characters or it will be rejected.