Mid 16th century; earliest use found in Nicholas Udall (1504–1556), schoolmaster and playwright. From reforge + -er.
Reforger2
/ˌriːˈfɔːdʒə/
Now historical
noun
An annual military exercise in which NATO forces are deployed to Germany.
The exercises started during the Cold War as a rehearsal for quickly strengthening military resources in Europe in the event of a conflict with the Soviet Union..
Origin
1960s; earliest use found in The Stars and Stripes. Acronym from the initial letters of either Return of Forces to Germany or Redeployment of Forces to Germany.