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The Shuttle famously (perhaps infamously) had its solid rocket boosters built in segments, which were transported to KSC and then joined together. The SLS will similarly have segmented SRBs.

Were segmented solid rockets used before the Shuttle? If so, which was the first one?

Note that I am not asking about solid rockets in general, just segmented ones.

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Yes, the UA120x series used on the Titan launchers starting with the Titan IIIC in 1965 were segmented -- starting with the UA1205 5-segment booster, and being extended to 6-segment and 7-segment boosters.

As far as I know that was the first segmented booster used on an orbital launcher; I'm sure there were smaller scale experimental segmented boosters prior to that.

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