How was nationalism a driving force behind the unification of Germany and Italy?

Nationalism is a unifying effect when it comes to history. Areas with similar languages and values have a lot to say, when you see that much is similar you realize that it is often better together. In Germany, the pus factor was Prussia's expansionism that might start it. This is similar to Italy, where several people speak the same language and share the same values.

pepin the short[a] (german: pippin der kurze, french: pépin le bref, c. 714 – 24 september 768) was the king of the franks from 751 until his death. he was the first of the carolingians to become king.[b][2]

the younger son of the frankish prince charles martel and his wife rotrude, pepin's upbringing was distinguished by the ecclesiastical education he had received from the monks of st. denis. succeeding his father as the mayor of the palace in 741, pepin reigned over francia jointly with his elder brother carloman. pepin ruled in neustria, burgundy, and provence, while his brother carloman established himself in austrasia, alemannia and thuringia. the brothers were active in suppressing revolts led by the bavarians, aquitanians, saxons, and the alemanni in the early years of their reign. in 743, they ended the frankish interregnum by choosing childeric iii, who was to be the last merovingian monarch, as figurehead king of the franks.

c 3 branches because idk why they had 3 well when:

you think of it there are still contrys with 3