Judo and firearms at S.O.X.
Facility operated by the Secret Organization for Extermination (S.O.X.) hidden under the Rockville Gardens, apparently located in Washington, DC.
Would-be exterminators receive instruction in judo and firearms, the latter, in the case of an undercover Smart, being the use of a cannon to be fired in an assassination attempt on the Chief during a performance of the 1812 Overture.
[Comic Strip Story #10 (Unofficial title: "Max in Sox").]