LArIAT is the repurposed ArgoNeuT detector, modified for use in a charged particle beam. It is a small volume Liquid Argon Time Projection Chamber (LArTPC) dedicated to the calibration and precise characterization of output response of these detectors. The charged particle test beam provides a controlled environment in which to tune simulations and to develop tools for particle identification, calorimetry, and event reconstruction without relying solely on simulation.