#After David defeated Moab, how did he decide which of the Moabite men would live and which would die?

David decided which of the Moabite men would live or die by making them lie down on the ground and measuring off two lines to put to death and one full line to keep alive. [8:2]

#What happened to the Moabites who were left alive?

The Moabites became servants to David and began to pay him tribute. [8:2]