smoke signals
Historical term for smoke signals used in ancient warfare, often alongside beacon fires (狼煙).
See also: 狼煙
In ancient China, smoke signals were used to warn of enemy attacks.
Standard kanji spelling for 'smoke signals'.
Variant spelling using the simplified form of 煙.
Compound of 烽 (signal fire) and 煙 (smoke), referring to smoke-based signaling in ancient East Asian warfare.