Welcome to the Big Cities Health Coalition's Front Lines Blog! We’re excited to launch it, and in future months, you’ll find posts from our members, the leadership of 28 of the nation’s largest, most urban health departments, and other key leaders in the field of public health. Here at the Coalition, we focus on research, policy and systems change, and advocacy. Integral to all of these is the availability of timely, accurate local data that is comparable across jurisdictions, so that we can gain insight into conditions on the ground. While there are plenty of resources for data at the state or county level, city level data is hard to come by. And that’s one of the gaps in the field that we’re seeking to fill. We recently published the Big Cities Health Inventory, where we gathered public health data from 26 member cities, and for the first time, put them in one place to allow for comparisons on various health indicators. The inventory also offers 12 “Winnable Battles Case Studies” that highlight some of the ways cities are tackling key health battles by executing cutting-edge public health practices with large-scale impact.