The Radar finds activities on the world map. Its construction requirement includes Base level 5. Building it opens tasks involving enemies, resources and other rewards beyond your base.
How Radar tasks work
Different tasks ask for different actions. A Red Legion outpost task sends a squad to attack, while resource-node tasks involve occupying a tile and gathering. The reward and assignment belong to the task you select.
A task requiring a squad needs an available march. If every squad is deployed, you must wait for one to return or recall a squad before giving it another assignment. The Squad buildings control those separate march slots.
Shared tasks and specialist rewards
Digging for Treasure Radar Tasks can be shared with your alliance. The Alliance Center opens alliance membership and the cooperation needed for those shared activities.
Some specialist abilities also interact with Radar tasks. Zoe, for example, provides extra intel chests after recruitment. That bonus belongs to the specialist, rather than an upgrade level on the Radar itself. The Radar is a single-level building; task rewards and specialist bonuses develop through their own systems.