Simplify the following text for a Grade 7 native English-speaking person.
Original: When her mother died in 1776 her father disguised himself as a British soldier to carry her on horseback through the British lines to her grandparents on Long Island , who cared for her during the war .
Simplified: Her mother died in 1776 when Anna was hardly one year old . During the American Revolution , Anna 's father dressed like a British soldier and carried her on horseback passing through the British lines to her grandparents on Long Island .