For which military operation was the NATO Medal first awarded?

The NATO Medal is an international military decoration which is awarded to various militaries of the world under the authority of the North Atlantic Treaty Organization (NATO). It is manufactured by Eekelers-Centini Intl, of Hemiksem, Belgium. The NATO Medal was first established in 1996 to recognize individuals who had served in the Implementation Force (IFOR) as part of Operation Joint Endeavor in Former Yugoslavia. A new ribbon was established in 1999 for participants in Operation Allied Force in Kosovo. As NATO operations became more common, different ribbons were established for each operation.

The Implementation Force (IFOR) was a NATO-led multinational peace enforcement force in Bosnia and Herzegovina under a one-year mandate from 20 December 1995 to 20 December 1996 under the codename Operation Joint Endeavour.