Almost. The Assiniboine (also called Hohe) are a separate and independent tribe living in parts of North Dakota, Montana, Alberta and Saskatchwan. They call themselves Nakota or Nakoda, giving a clue to their origins; they separated from the Yanktonai Dakotas in the 16th century, so they were originally part of the Sioux family of tribes.
Their language is classed as Siouan, but it is not the same as the language of the Lakotas and other Sioux groups:
English................Assiniboine......................Lakota
sun.....................ompawee'.......................anpetuwi
day.....................ompaitoo........................anpetu
friend...................codah.............................kola
small bird..............zit'kahnah.......................zitkala
one......................washeenah......................wanchi
Although classed as "Siouan" in regard to their language they are not included with the Sioux tribes, so the term Assiniboine Sioux is incorrect.
Similarly, the Crows separated at an early date from the Hidatsas and the Arikaras split away from the Pawnees; the Crows are not Hidatsas and the Arikaras are not Pawnees, despite the very close relationships in language.
Same thing, but just in a deeper voice, and said with feeling.
The special thing about The Sioux is that they are a unique tribe. Probably the only two tribes that participated in the battle of the little bighorn. Sioux Indians are special.
Same thing, but just in a deeper voice, and said with feeling.
The plural form of Sioux is Sioux.
That sort of thing is impossible to know.
Sioux City
We powwow with the Sioux tomorrow. Let's go visit the Sioux. That is a Sioux headdress.
the thing that is important about it is that it was a Sioux battle with US troops and was very well known about.
Visions are an individual thing in most cases. Young Sioux boys customarily had their 'vision quest' to receive guidance for their lives. Probably the most well known Sioux vision can be found in the book 'Black Elk Speaks', which includes the holy man's personal visions and those for his nation.
In 1862 the Dakota Sioux were known as the Dakota/Dakotah or the Sioux or the Dakota Sioux.
Sioux
Sioux Lehner's birth name is Sioux Lewellyn.