So George Washington and those at the birth of the USA put the British flag happily as part of their own and you can't see that significance?
But to be honest, If you personally can't even get the difference between England and Britain right, then what hope the rest of your personal pop history?
There were many individual flags in use initially, but by the time we took the Union Jack at Yorktown our armies marched under the Stars and Stripes...and I do see the significance in that.
"But to be honest, If you personally can't even get the difference between England and Britain right, then what hope the rest of your personal pop history?"
LOL! I'm sure your grasp of pop history is far superior to the grasp your nation retains over all it's many colonies.