No. Without concordance it is rebellion, not secession.
"Concordance" as in "agreement"?
Here is somebody who agrees with me that states seceded from the British Empire, John Remington Graham, author of the book, "Free, Sovereign and Independent States," 2009, Pelican Publishing Company. From page 117:
"These colonies did not all break away at once, but began to secede from the British Empire one by one. Before the Declaration of Independence on July 4, 1776, five colonies had formally seceded, and the remainder had established provisional governments, each of them autonomous of the others. In practical effect all thirteen were free, sovereign, and independent States."
I posted one of those secessions from Britain above. You will note in that document that Virginia termed itself a country.