High Quality Content by WIKIPEDIA articles! The sica was a short sword or large dagger of ancient Thracians/Dacians peoples, used in Ancient Rome too. It was originally depicted as a curved sword, (see the Zliten mosaic as well as numerous oil lamps) with a blade about 16-18 inches long (40 – 45 cm) and many examples have been found in what are today Romania, Bosnia, Bulgaria and Serbia, as well as depicted on the Trajan Column. From a typological point of view, though there is a strong tendency towards standardization, the sica daggers can be organised in three main types that differ only by morphological aspects, not functional.