collective-history:

Signal arrows were a type of arrow used by the samurai class of feudal Japan. Kabura-ya were arrows which whistled when fired and were used in ritual archery exchanges prior to formal medieval battles. The sound was created by a specially carved or perforated bulb of deer horn or wood attached to the tip.
The Chinese xiangjian (sometimes pronounced and written mingdi) was quite similar, and up until the end of the Warlord Era were commonly used by bandits to announce the gang’s approach.

collective-history:

Signal arrows were a type of arrow used by the samurai class of feudal Japan. Kabura-ya were arrows which whistled when fired and were used in ritual archery exchanges prior to formal medieval battles. The sound was created by a specially carved or perforated bulb of deer horn or wood attached to the tip.

The Chinese xiangjian (sometimes pronounced and written mingdi) was quite similar, and up until the end of the Warlord Era were commonly used by bandits to announce the gang’s approach.