Assertion: pineapple grenade | /r/ObjectUse | used since world war i.
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Source sentences:
text: The M67 is a further development of the M33 grenade, itself a replacement for the M26-series grenades used during the Korean and Vietnam Wars, and the older Mk 2 "pineapple" grenade used since World War I.
text: The M67 is a replacement for the M61 grenade used during Vietnam and the older Mk 2 "pineapple" grenade used since World War II.