Union of Liberation
On January 10, 1978, Pedro Joaquín Chamorro, the editor of the opposition newspaper "La Prensa" and leader of the "Democratic Union of Liberation" (Unión Democrática de Liberación – UDEL), was assassinated. His assassins were not identified at the time, but evidence implicated Somoza's son and other members of the National Guard. Spontaneous riots followed in several cities, while the business community organized a general strike demanding Somoza's resignation.