Crazy Horse is portrayed as a fierce warrior who, alongside Sitting Bull, is determined to protect the Lakota people's land and way of life. Together, they organize an unprecedented resistance movement against the encroaching US Army and settlers in the Great Plains during the aftermath of the Civil War.

In 'Nations Collide,' Sitting Bull steps into a crucial leadership role by rallying his people to resist the American settlers taking their land. His leadership is shown as pivotal in forming a resistance movement that is both unprecedented and inspiring.

Yes, supporting characters such as Runs His Horse and Teonna are introduced. Runs His Horse does not survive through the entire series, while Teonna is suggested to have her own adventures, possibly traveling to California and having a storyline involving a brief romance with Pete Plenty Clouds.

Season 1, particularly the episode 'Nations Collide,' focuses on the tensions and conflicts arising from settlers encroaching on Native American lands, setting the stage for major historical confrontations. The series also includes reenactments of important scenes such as the Battle of Little Bighorn, which is a significant event related to Sitting Bull's resistance.

The series shows Sitting Bull gathering an unprecedented alliance of Native nations to resist the US Army and settlers. This alliance is a key element of the resistance movement depicted in Season 1, highlighting Sitting Bull's role in uniting different tribes to protect their land and culture.