Complex sentence: Some historians believe that armour was not depicted to differentiate Dacians from Romans as both used the same style shield and other sources indicate that Dacians by this time had undergone Romanisation, used Roman military tactics and sometimes wore Roman style scale armour.
Split into simpler sentences: Some historians believe that armour was not depicted to differentiate Dacians from Romans, as both used the same style shield. Other sources indicate that Dacians by this time had undergone Romanisation, used Roman military tactics, and sometimes wore Roman style scale armour.