Final answer:
The acronym used to help leaders distribute target assignments, locate targets, and regulate firepower is ADDRAC. It stands for Alert, Direction, Description, Range, Assignment, and Control.
Step-by-step explanation:
The acronym used to help leaders distribute target assignments, locate targets, and regulate firepower is ADDRAC. ADDRAC stands for Alert, Direction, Description, Range, Assignment, and Control. 
Alert:
 Leaders are alerted to the presence of a target.
Direction:
 Leaders give specific directions for engaging the target.
Description:
 Leaders provide detailed information about the target.
Range:
 Leaders determine the distance to the target.
Assignment:
 Leaders assign units to engage the target.
Control:
 Leaders regulate the use of firepower and evaluate the effectiveness of engagement.
This acronym is commonly used in military operations to ensure effective target engagement and coordination of forces.