"Military intelligence" and "jumbo shrimp" are examples of what?
Oxymorons occur when two opposite words are paired together in an ironic way, often for humorous effect.
For example, "jumbo shrimp" is funny because shrimp are "tiny" and jumbo is "large".
Military intelligence is ironic because we think of physical combat and mental intelligence as opposites, yet they are combined in this case.
Here are more examples of oxymorons.