四一二事變

1. • the coup of 12th Mar 1927, an attempt by Chiang Kai-shek to suppress the communists
2. • called 反革命政变 or 惨案 in PRC literature

Character by character

• 四(sì)four
• 一(yī)one
• 二(èr)two
• 事(shì)matter
• 變(biàn)change