Maui police say a 2-foot-long cylindrical ordnance was found in a field off of Mokulele Highway in Puunene on Monday.
When officers arrived on the scene, photographs were taken of the ordnance and sent to the Army's Explosive Ordnance Division for their review.
After police conferred with the Army, it was revealed that the ordnance posed no immediate danger due to the lack of structures within 200 yards of then ordnance.
The ordnance was cordoned off under the Army could determine if it was live or inert.
The ordnance was too dangerous to transport so the Army blew it up at around 12:20 a.m. Tuesday.