US military forces do a lot at home and abroad, but the different types of troops and the rules for each can be confusing.
The air and missile defense system can integrate sensors and weapons that were never designed to work together.
The complex would be the world’s largest military command centre and include bombproof bunkers for leaders, say US intelligence officials.
The Army plans to begin competitive prototyping of a next-generation battlefield command-and-control system this spring.