Assertion: mortar | /r/ObjectUse | used in 1413 naval battle
Facets:
Source sentences:
text: However, earlier mortars were used in Korea in a 1413 naval battle when Korean gunsmiths developed the Wan'gu (gourd-shaped mortar) (완구, 碗口).
text: However, earlier mortars were used in Korea in a 1413 naval battle when Korean gunsmiths developed the Wan'gu (gourd-shaped mortar) (완구, 碗口).