### Question
How does General Military Law define milestone O decision?


### Answer
Under *10 U.S.C. § 2364*, **milestone O decision** is defined as:

> the decision made within the Department of Defense that there is a mission need for a new major weapon system and that research and development is to begin to meet such need

#### Citation:
  - *10 U.S.C. § 2364*
  - Heading: **Subtitle A-General Military Law > PART IV-SERVICE, SUPPLY, AND PROCUREMENT > CHAPTER 139-RESEARCH AND DEVELOPMENT**

