Manufacturer: DCNS
Primary Users: French Navy
Program Cost: $17.1 billion* (FY2009)
Unit Cost: $3.1 billion* (FY2009) for Terrible
In English, this Triomphant-class submarine’s name translates to the “Next-Gen Device Launching Nuclear Submarine” from its original French title. The Terrible has been in service since 1997, with building beginning in 1986. Building ended in 2010, with four of the class completed (all that was planned).
https://za.investing.com/magazine/worlds-most-expensive-military-vehicles/article/53044