There is a total of 6422 clues beginning with op
- Operation Allied Force grp
- Operation at the Alamo
- Operation at Wimbledon
- Operation by an obstetrician
- Operation centers?
- Operation Christmas card
- Operation creation
- Operation Crossroads event, 1946
- Operation Crossroads
- Operation Cyclone org
- Operation Deliberate Force nation
- Operation Desert Fox, eg
- Operation Desert Storm setting
- Operation Desert Storm target
- Operation Desert Storm vehicle: Abbr
- Operation Desert Storm's beginning
- Operation designed to hurt
- Operation Dragoon's loc: Abbr
- Operation Enduring Care gp
- Operation Enduring Care sponsor
- Operation Exodus participant
- Operation for a new liver or kidney
- Operation Hastings org
- Operation headed up by Eisenhower
- Operation heroine
- Operation IceBridge grp
- Operation in "The Sting"
- Operation in 1990 news
- Operation in 1998 news
- Operation Iron Hammer locale
- Operation Ivy "Yellin' in My ___"
- Operation Just Cause's setting
- Operation locations, for short
- Operation Lumberjack's objective
- Operation Mail Call gp
- Operation Mail Call grp
- Operation memento
- Operation Mongoose org
- Operation needs
- Operation Neptune Spear group
- Operation Neptune Spear org
- Operation Overlord beach
- Operation Overlord event
- Operation Overlord event of 1944
- Operation Overlord high point
- Operation Overlord launch
- Operation Overlord locale
- Operation Overlord monogram
- Operation Overlord overseer
- Operation Overlord time
- Operation Overlord vessel, for short
- Operation Overlord's domain: Abbr
- Operation Overlord's time
- Operation Overlord, eg
- Operation Phone Home gp
- Operation Pipe Dreams org
- Operation Red Dawn city
- Operation Red Dawn defender
- Operation Redwing event, 1956
- Operation reminder
- Operation reminders
- Operation setting?
- Operation Shylock writer
- Operation since August 1990
- Operation So-and-so
- Operation Solomon airline
- Operation Solomon carrier
- Operation souvenir
- Operation souvenir?
- Operation specialist
- Operation springboard
- Operation that often precedes an entrapment claim
- Operation that yields the remainder from dividing two numbers, in math lingo
- Operation time
- Operation times
- Operation Torch setting: Abbr
- Operation Torch target
- Operation Trinity event
- Operation Trinity locale
- Operation Uphold Democracy site
- Operation VIP
- Operation Warp Speed org
- Operation __ Freedom (2003-2011 conflict)
- Operation ___ (D-Day invasion)
- Operation ___ (military campaign launched on D-Day)
- Operation ___ Freedom
- Operation ___ Freedom (2003)
- Operation ___
- Operation ____: naval Antarctica project
- Operation _____ (military action)
- Operation's start
- Operation, eg
- Operation-launching time
- Operation-launching times
- Operation
- Operational
- Operational area of Adm Nimitz
- Operational branch
- Operational details, informally
- Operational details, slangily