Various mechanisms are used to manage or curb interservice rivalries. Military slang is often used to reinforce or reflect (usually friendly and humorous) interservice rivalries. Jokes along this tendency are also re-worded to exploit interservice rivalries. On 24 January 1913 came the first wartime naval aviation interservice cooperation mission. This slang is also used to reinforce the (usually friendly) interservice rivalries. There is also considerable interservice rivalry between the German Army, the Schutzstaffel, and the Gestapo. However, the deployment also revealed interservice tensions. This resulted in the UNT course being redesignated as Interservice Undergraduate Navigator Training (IUNT). At that point, the Nosenko issue evolved into an interservice confrontation. Interservice/Industry Training, Simulation and Education Conference (I/ITSEC). However, only one Army Interservice Competition Badge can be worn at a time. Two-time interservice champion in 1973, 1975. Other terms included the interservice transfer of 50 B-25Cs and 152 B-25Ds to the Navy.