Modern accelerator-based neutrino experiments use complex nuclei, such as argon, as neutrino
targets that rely on nuclear models to unfold the reconstructed neutrino energy to the true neu-
trino energy. The nuclear effects complicate the neutrino oscillation measurements and are not
well-understood, and there are very limited measurements of hadron cross sections on argon.
ProtoDUNE-SP, a prototype liquid argon time projection chamber (LArTPC) for the Deep Un-
derground Neutrino Experiment (DUNE) far detector, collected data from a hadronic test beam
at CERN in 2018, including protons, pions, and kaons in the range 1 to 7 GeV/c. In this talk, we
will present the status and results of the many hadron-argon cross section analyses.