Final answer:
The main purpose of an Acquisition and Cross-Servicing Agreement (ACSA) is to facilitate mutual cooperation between countries.
Step-by-step explanation:
The main purpose of an Acquisition and Cross-Servicing Agreement (ACSA) is to facilitate mutual cooperation. An ACSA is a bilateral agreement between two countries that allows them to exchange and share logistical support, supplies, and services during military operations or other missions. It promotes interoperability and strengthens the relationship between the countries involved.