Germanicus in the meantime captured Splonum among other places in Dalmatia, in spite of the fact that it occupied a site well fortified by nature, was well protected by walls, and had a vast number of defenders. Consequently he had been unable to make any headway either with engines or by assaults; but he took it as the result of the following incident. Pusio, a German horseman, hurled a stone against the wall and so shook the parapet that it immediately fell and dragged down with it a man who was leaning against it. At this the rest became alarmed and in their fear abandoned that part of the wall and ran up to the citadel; and later they surrendered both the citadel and themselves.
Edition :
Dio's Roman History. Cassius Dio Cocceianus. Earnest Cary. Herbert Baldwin Foster. William Heinemann, Harvard University Press. London; New York. 1914-.
Remark :
topology: The exact location of Splonom is not know, according to the New Pauly is it either at Šipovo or Plevlje.(https://referenceworks.brillonline.com/entries/brill-s-new-pauly/splonum-e1119590)
Notes :
For the siege of Splonum itself, please refer to: "Germanicus and his army lay siege to Splonum."