I attended Falls Church years ago. They broke apart over doctrinal disagreements.
This congregation dates to 1732. President George Washington, and George “Bill of Rights” Mason were both vestryman.
The congregation didn't break apart. Only 27 members (or about 1% of the membership) voted to stay with the apostate Episcopal church. The low life bishop reneged on the deal and took the property from the Christians who voted to leave.