On 10th January, 1940 Britannic III made her second wartime arrival at New York; already armed with a six-inch and a three-inch gun at the time of her last trip in November, she had since been painted grey and had pillboxes installed on each wing of the bridge. On board were eight race horses, five from the stable of the Aga Kahn - on their way to purchasers in the United States.

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On 4th December, 1960, Britannic III arrived at Liverpool at the end of her 275th and last voyage - the last passenger voyage of a White Star liner.

She made the final departure of a White Star vessel from Liverpool on 16th December 1960; leaving under her own power for breaking up at Inverkeithing and arriving there on 19th December at Thomas W. Ward Shipbreakers for demolition.