defection
n.the act of leaving a group, country, or organization to join a different one. It is often used when someone leaves their own side to join the enemy.
n.the act of leaving one's own country, party, or organization to join another, especially an opposing one. Often carries a political or military connotation.
“The defection of the general caused a major shift in the war.”
“The government offered a safe passage to any citizen who wished to defect to the neighboring country.”
“The sudden defection of several high-ranking officials raised serious questions about the internal stability of the administration and its ability to maintain a unified front.”
“It was marked by a dizzying wave of defections and bitter internal conflicts.”
“While a defeat would not mean that Tinubu has lost the southwest, it would challenge the assumption that political defections and elite alliances automatically translate into electoral support.”