In the old cold war days you got one ribbon, the GSM, and the various punch ups you were involved in were represented by bars.
... indeed - took me 31 years from first GSM to second bar (although other campaign etc medals were earned - but "only round ones!").
Funny old world - when I joined most stn cdrs seemed to have (at least) a DFC and a few campaign ribbons, if not a DSO - then came the relatively medal free cold war years when there were AOCs with nothing between their wings and their breast pocket button, if they'd managed to avoid MBE/OBE or maybe an AFC for being a display pilot.
And now - most stn cdrs seem to have (at least) a DFC and a few campaign ribbons, if not a DSO .......
plus ça change .....
Edited to add: and for
O-D/Cpl P 
, does that now make you "Jubilee Medal and bar"?
