  e-ASTROGAM is a gamma-ray observatory operating in a broad energy range, 0.15
MeV - 3 GeV, recently proposed as the M5 Medium-size mission of the European
Space Agency. It has the potential to revolutionize the astronomy of
medium-energy gamma-rays by increasing the number of known sources in this
domain by more than an order of magnitude and providing gamma-ray polarization
information for many of these sources. In these proceedings, we discuss the
expected capacity of the mission to study the physics of supernovae, both
thermonuclear and core-collapse, as well as the origin of cosmic rays in
supernova shocks.
