In today’s newsletter: Yoon Suk Yeol’s shock declaration – and subsequent reversal – has sent South Korea into political chaos, and left their president facing impeachment

Good morning. South Korea’s president, Yoon Suk Yeol, is facing impeachment after he sent heavily armed forces into Seoul’s streets with his baffling and sudden declaration of martial law on Tuesday. The move stirred memories of past dictatorships in the country, moving thousands to come out on to the streets and protest, with the military powerless, or unwilling, to do anything about it.

Opposition parties submitted an impeachment motion hours after parliament unanimously voted to cancel Yoon’s declaration, forcing him to lift martial law just six hours after it began. Impeaching Yoon requires the support of two-thirds of the national assembly and at least six of the nine constitutional court justices. The liberal opposition Democratic party holds a majority in the 300-seat parliament and has called for Yoon’s resignation. A vote on his impeachment could come as early as tomorrow. Today we’ll look at what happened and why.