e-ASTROGAM (enhanced ASTROGAM) is a breakthrough Observatory space mission dedicated to the study of the Universe using gamma-rays in the mostly unexplored and crucial MeV-GeV energy range. e-ASTROGAM has been proposed for the ESA M5 mission. Thanks to its performance in the MeV-GeV domain, substantially improving its predecessors, e-ASTROGAM will open a new window on the non-thermal Universe, making pioneering observations of the most powerful Galactic...