Passage: During the Middle Ages sword technology improved, and the sword became a very advanced weapon. The spatha type remained popular throughout the Migration period and well into the Middle Ages. Vendel Age spathas were decorated with Germanic artwork (not unlike the Germanic bracteates fashioned after Roman coins). The Viking Age saw again a more standardized production, but the basic design remained indebted to the spatha.Around the 10th century, the use of properly quenched hardened and tempered steel started to become much more common than in previous periods. The Frankish 'Ulfberht' blades (the name of the maker inlaid in the blade) were of particularly consistent high quality. Charles the Bald tried to prohibit the export of these swords, as they were used by Vikings in raids against the Franks.

Question: What type of weapon was mostly used during the Migration and the Middle Ages?
spatha