How do Army units connect tactical systems while in garrison?

The most appropriate method for Army units to connect tactical systems while in garrison is through a local area network (often referred to as a LAN). This type of network provides a robust and efficient means for units to communicate and share data internally, as it allows for high-speed connections and the ability to link multiple devices and systems within a limited geographic area.

While connections via satellite communications are vital for operations in remote or deployed environments, they are not typically utilized in garrison settings where stable ground-based infrastructure like LANs is available. Secure communications relate more to the protection of data transmission rather than the actual connection method.

Therefore, using a local area network is the primary means for ensuring effective communication and connectivity of tactical systems within the garrison environment, leveraging existing technologies and capabilities.