Yes, Pocahontas (by Disney) is largely based on history, however it is notable that it isn't completely historically accurate (as is with many childrens films) so don't assume that all of it is historically accurate.
John Adams married Abigail Smith.
1764
John Adams and Abigail Smith were married on October 25, 1764. Abigail's father, Reverend Smith, officiated in the ceremony.
She didn't marry John Smith she married John Rolfe. She was only 10 when she married John Rolfe. She married John Rolfe in 1614, she was 19, she died in 1617 at age 22
John Smith never got married
john Bolton married to Christine Bolton from 1972 to 1983 john Bolton married to Gretchen Smith in 1986
John Adams and Abigail Smith were married in her parents' home in Weymouth Massachusetts.
No Sam married john, and abi married george
pocahontas wanted to marry john smith
Captain John Smith did not marry Pocahontas. Pocahontas was forced to marry John Rolfe, and had to come to London with him when he left Jamestown. She died by age 21.
Mary Powhatan did not marry John Smith; instead, she was the daughter of Chief Powhatan, the leader of the Powhatan Confederacy. There was a notable interaction between John Smith and Powhatan's daughter, often romanticized in stories, but they did not have a formal marriage. Historical records indicate that Smith and Powhatan's relationship was more of a diplomatic nature than a marital one.
Jedediah smith did not marry anyone.