Archaeologists hired to dig at World War I training trenches on the Iowa National Guard Base at Camp Dodge have uncovered several artifacts dating to when the United States entered the war: rifle shell casings, a machine gun suppressor from the era and non-exploding grenades.

Excavation began last week in Johnston and continued Wednesday with the team working to learn more about the trench systems, which were used for training U.S. soldiers before they were shipped out to Europe.

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