Final answer:
North Dakota is known by nicknames such as Sioux State, Peace Garden State, Flickertail State, and Roughrider State, each reflecting different aspects of the state's heritage and culture.
Step-by-step explanation:
The state with the nicknames Sioux State, Peace Garden State, Flickertail State, and Roughrider State is North Dakota. Each nickname has its own historical and cultural significance.
For instance, the "Peace Garden State" refers to the International Peace Garden on the border with Canada, symbolizing peace between the nations.
"Sioux State" acknowledges the presence and influence of the Sioux tribes, while "Flickertail State" is named after the Richardson ground squirrels, colloquially known as flickertails, native to the region.
Lastly, "Roughrider State" pays homage to the 1st United States Volunteer Cavalry, known as the Rough Riders, which included members from the Dakota Territory.