History's Most Costly Military Vehicles Revealed

5. Panzer 68 – Switzerland

Eidgenössische Konstruktionswerkstätte serves as the manufacturer. The Swiss Army operates as the primary user. Expense: $481.95 million for the complete project (101 tanks) The Panzer 68 served as the Swiss Army's main battle tank, manufactured by Eidgenössische Konstruktionswerkstätte. It was developed during the 1960s and remained operational until the late 1990s. A 1979 article in the Swiss magazine Weltwoche exposed several defects in the Panzer 68.

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Panzer 68 (Switzerland) | Wikimedia.org ©LutzBruno The article resulted in the Swiss Minister of Defense's resignation. One significant problem involved the heating system, which could accidentally discharge the main cannon when activated. These issues were subsequently resolved through modifications, but the Panzer 68 was eventually replaced as the Swiss Army's main battle tank.