Novella. "Enter a Soldier. Later: Enter Another" is a science fiction novella written by Robert Silverberg. It was first published in 1990. The story is set in a future where a supercomputer has been programmed to simulate famous historical figures. The plot revolves around a simulation of Francisco Pizarro, the Spanish conquistador, who is revived in this digital form and faces off against another simulation, the Inca emperor Atahualpa. The novella explores themes of history, identity, and the impact of technological advancement on humanity's understanding of the past.
 
Silverberg's work often delves into speculative futures and complex psychological themes, and this novella continues that tradition by examining how historical figures might behave when removed from their original contexts.