South Korean President Yoon Suk Yeol defended his martial law decree as an act of governance and denied rebellion charges, vowing Thursday to “fight to the end” in response to attempts to impeach him and intensifying investigations into last week’s dramatic move.

South Korean President Yoon Suk Yeol said on Thursday he would "fight to the end" as his own political party shifted closer to voting with the opposition to impeach him over his short-lived martial law order that threw the U.