The correct answer is - preserved the union.
The Civil War in the United States was a long and bloody conflict. It was between the North and the South, the two halves that had totally different policies and ambitions for the future. Despite the war being terrible and with lot of people who lost their lives, as all wars, something good came out of it too. The big positive of the Civil War was that it actually managed to preserve the unity between the states, thus creating the mighty United States of America, which eventually became the biggest power house on the planet.
Japan has many mountains, thus, the outsiders could not easily enter Japan and Japanese could not leave the country. And, thus the self-isolation was helped by the presence of a mountain terrain. This policy was implemented by Togukawa, who insisted on preventing Japan from foreigners.
The pagan Franks, who had been migrating to Gaul from the third century, with their ruling Merovingian dynasty converted to the Catholic Church on Christmas Day in 498, following the Battle of Tolbiac, when Clovis I converted and was baptised at Reims.
Hopes it helps you.
It allowed them to settle down and not live always on the move as Nomadic tribes. They became established farming colonies.
The bloody massacre in king street