H-hour

H-hour refers to a specific time set for the start of a military operation, particularly in wartime scenarios. It is often used in conjunction with D-day, which indicates the day the operation begins. Essentially, H-hour is crucial for planning and coordination, allowing all units and personnel involved to synchronize their actions at a determined moment. This term helps ensure that various components of a mission launch simultaneously, maximizing efficiency and effectiveness in achieving operational goals. The precise timing is vital for maintaining secrecy and the element of surprise.