The phrase "after the unification" is correct and usable in written English.
It can be used to refer to a time period or events that occur following a process of unification, whether in a political, social, or organizational context.
Example: "The policies implemented after the unification significantly improved the economic stability of the region."
Alternatives: "following the unification" or "subsequent to the unification".
After the unification, the country was reorganized in accord with the Chinese bureaucratic model.
Published just after the unification of Italy, this cookbook served to unite our country more than any government ever could.
Beyond Borgo lies Prati, a wealthy suburb, built after the unification and characterised by a rational grid of housing blocks.
After the unification measure passed in 1997, she was elected mayor and chief executive of the combined government, then re-elected this spring.
The tourist industry was hard hit & the Swiss slammed the door in Italy' face, much as Italy had done to Ticino a century earlier, after the unification.
After the unification of Italy, writers began to explore subjects theretofore considered too lowly for literary consideration, such as poverty and living conditions in the Mezzogiorno.
Reconstruction of the Saxon royal palace, the Zwinger, and other sites began after the war; unification opened up more resources and has allowed relatively rapid reconstruction, for example, on the city's famed Frauenkirche.
Han Fei's suggestion to eliminate "texts written in books and on bamboo strips" and to turn officials into teachers was implemented by his fellow student and nemesis, Li Si, soon after the imperial unification of 221 BCE.
After the 1953 unification of Cypriot football, Nea Salamina played in the Cypriot Second Division; its goal during the first season was winning promotion to the first division.
For example, after the German unification, efforts toward the improvement of air quality substantially decreased the mass concentrations for many pollutants but failed to cut down the number concentrations (i.e., the fraction of UFPs < 30 nm).
Our goal was to investigate the association of ambient air pollution and daily mortality in Erfurt, Germany, over a 10.5-year period after the German unification, when air quality improved.
