Short answers, pulled from the story.
Bob Iger announced the Star Wars: Galaxy's Edge land on the 15th of August 2015 at the D23 Expo. This announcement followed years of planning that began in the early 2010s when Walt Disney Imagineering initially developed plans for a Star Wars-themed area at Disney's Hollywood Studios.
The team decided to create a new planet called Batuu rather than using established locations from previous movies. The specific village within this new world was named Black Spire Outpost and had been briefly mentioned in the 2018 film Solo: A Star Wars Story.
Millennium Falcon: Smugglers Run and Star Wars: Rise of the Resistance are the two main attractions that opened with the land. Millennium Falcon: Smugglers Run opened at Disneyland on the 31st of May 2019, while Star Wars: Rise of the Resistance spans approximately twenty-eight minutes and contains more than three hundred animated objects.
John Williams returned to compose the main musical theme for Star Wars: Galaxy's Edge after decades of composing for the franchise. William Ross conducted the symphonic recording with the London Symphony Orchestra on behalf of Williams and arranged the original composition into different musical contexts for use within the park environment.
At Disneyland, Star Wars: Galaxy's Edge occupies the northwest portion of the park with three entries from Frontierland, Bayou Country, and Fantasyland. Walt Disney Imagineering closed Big Thunder Ranch and adjacent backstage areas to make room for the expansion.