Answer: Homeland defense, multi-national exercises, security cooperation events, and deterrence operations
Explanation:
Homeland defense (HD) is the protection of a territory, sovereignty, domestic population, and critical infrastructure against external threats and aggression.
Security cooperation includes defense trade and arms transfers, humanitarian assistance and disaster relief, institutional capacity building, and international education and training activities.
Deterrence operations convince adversaries not to take actions that threaten US vital interests by means of decisive influence over their decision-making.
