California fire agencies built one command system after burning separately

In a 13-day stretch of September 1970, 773 wildfires burned across Southern California, killing 16 people and destroying 722 homes — and much of the failure was not the fire but the response: agencies fighting the same blaze had no shared command structure, and "numerous problems with communication and coordination hampered their effectiveness."

An interagency group called FIRESCOPE was formed to fix the coordination problem directly rather than pour more money into equipment or manpower. Its first Technical Team was established in 1973 to design a shared management structure, which became the Incident Command System: one incident commander, modular roles that scale up or down, and terminology every agency agreed to use the same way — parts of it were already being used successfully on major incidents by 1980.

After catastrophic wildfire coordination failures, agencies built the Incident Command System: one commander, modular roles, common terminology.

Built one command system: a single commander, common terms, and modular roles any agency could plug into, so independent teams combine without losing their own chains.

A single incident commander eliminates competing chains of command, so decisions are made once.

Standardized terminology lets personnel from different agencies work together immediately.

Modular roles scale from small to large incidents, making the system broadly applicable.

When independent teams must combine on short notice, fix coordination with a shared structure, not more resources.

ICS became the US national standard and was adopted far beyond fire — hospitals, utilities, and eventually software incident response.