  The reaction mechanisms for neutrino interactions with an $^{40}Ar$ nucleus
with the LBNF flux are calculated with the Giessen-Boltzmann-Uehling-Uhlenbeck
(GiBUU) transport-theoretical implementation of these interactions.
Quasielastic scattering, many-body effects, pion production and absorption and
Deep Inelastic Scattering are discussed; they all play a role at the LBNF
energies and are experimentally entangled with each other. Quasielastic
scattering makes up for only about 1/3 of the total cross section whereas pion
production channels make up about 2/3 of the total. This underlines the need
for a consistent description of the neutrino-nucleus reaction that treats all
channels on an equal, consistent footing. The results discussed here can also
serve as useful guideposts for the Intermediate Neutrino Program.
