What is indicated by DEFCON 3?

DEFCON 3 indicates a state of increased readiness for existing threats. In this alert level, military forces are prepared to mobilize more quickly than during routine peacetime operations, emphasizing an elevated awareness and the ability to respond effectively to potential conflicts or crises. This state of readiness reflects a precautionary stance rather than a response to an active threat, as forces may be prepared for various possible aggressive actions by adversaries without being fully mobilized or on high alert for an immediate attack.

In contrast, the other options represent different states of military readiness or operational posture that do not align with the significance of DEFCON 3. For instance, normal peacetime operations would indicate no change in readiness, while maximum alert for an incoming attack represents a much more serious and immediate level of crisis reflected in a lower DEFCON level. Additionally, focusing only on intelligence indicates a more passive approach rather than the proactive readiness indicated by DEFCON 3.