Which high-profile military product launch of the 1980s was nicknamed 'The Divad' and was canceled after only 65 units were produced, despite a planned purchase of 618 units and $1.8 billion spent?

Throughout military history, there have been numerous weapons and equipment designed with high expectations that ultimately failed spectacularly when deployed. These product failures cost nations billions, sometimes changed the course of wars, and taught valuable lessons about innovation under pressure. Test your knowledge about one of history's most infamous military product failures that has become a cautionary tale in defense procurement circles.

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The M247 Sergeant York anti-aircraft gun
The XM29 OICW infantry combat weapon
The Expeditionary Fighting Vehicle (EFV)
The RAH-66 Comanche stealth helicopter