whom did he marry?
Rachel Donelson Robards
Andrew Jackson
Here Jackson became acquainted with their daughter, Rachel Donelson Robards. The younger Rachel was in an unhappy marriage with Captain Lewis Robards; he was subject to fits of jealous rage. The two were separated in 1790. According to Jackson, he married Rachel after hearing that Robards had obtained a divorce. 
why did ohio and michigan have such conflict over their state boundaries The governments of Ohio and Michigan both claimed jurisdiction over a region along the border, now known as the Toledo Strip. did it lead to any war? The Toledo War of 1835-36. how was this event significant for the economy? The Toledo strip was a commercially important area, but a part of it called the Great Black Swamp was difficult to navigate. During the conflict, the Erie Canal was built, linking New York City and the Eastern seaboard to the Great Lakes at Buffalo, and immediately became a major route for trade and migration. who was the president during this event? President Andrew Jackson did he have a career in law as well? Yes, he served as a prosecutor in the Western District of North Carolina, as it was called then.
wiki:1538433
Andrew Jackson [SEP] Legal career and marriage
The two were separated in 1790. According to Jackson, he married Rachel after hearing that Robards had obtained a divorce. Her divorce had not been made final, making Rachel's marriage to Jackson bigamous and therefore invalid. After the divorce was officially completed, Rachel and Jackson remarried in 1794. To complicate matters further, evidence shows that Rachel had been living with Jackson and referred to herself as Mrs. Jackson before the petition for divorce was ever made. It was not uncommon on the frontier for relationships to be formed and dissolved unofficially, as long as they were recognized by the community.