A set of medals presented to Major General Sir James Edward Alexander during the 1800s crossed the block at Bonhams on November 12.
The collection made £19,200 ($30,264) - a 28% increase on its £15,000 ($23,852) estimate.
Alexander's long and distinguished career with the British East India Company led him to some of the furthest outposts of the empire.
He rose through the ranks to become a major in 1846.
In addition to his military duties, he was a keen explorer and contributed to the mapping of South Africa and Namibia. He was also behind the installation of Cleopatra's Needle on London's Embankment.
Included in the collection are a Knight of Justice breast star and an Italian Al Valore Militare.
A set of medals belonging Major General BH Chappel also performed well, achieving £15,600 ($24,590).
Chappel led the West brigade during the battle of Crete, one of the most vicious battles of the second world war. The action took place over 11 days in the summer of 1941.
The Allies were ultimately forced into retreat - with Chappel holding a key position as cover.
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