Answer:
When and why did the Lord Chamberlain's Men become the King's Men?
The Lord Chamberlain's men became the King's Men following the accession of James I in 1603.
Who was the King at that time?
King James I
What happened to the Globe Theatre?
The Globe Theatre, where most of Shakespeare's plays debuted, burned down on June 29, 1613. The Lord Chamberlain's men built Blackfriars theater in 1608, a smaller theater that seated about 700 people, to use in winter when the open-air Globe wasn't practical.