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Meritorious Unit Commendation was created in 1973.
Meritorious Team Commendation was created in 1993.
No, there is no medal associated with it.
No, it received the Meritorious Unit Commendation.
Yes - USS BARB (SSN-596) received 2 Vietnam Campaign stars, the Battle "E", the Meritorious Unit Commendation, and a Navy Unit Commendation (1966).
Her crew was also awarded the Navy Expeditionary Medal.