In relativistic heavy-ion collision experiments, atomic nuclei are accelerated to relativistic speeds and made to collide. These extreme conditions are sufficient to break the nuclei into their constituents, thereby allowing us to study their interactions as formulated within quantum chromodynamics. The Glasma describes the dynamical state directly after the collision and is characterized by strong color fields with high occupation numbers that evolve according to classical Yang-Mills equations. I will discuss the Glasma in the dilute approximation, which enables us to calculate the Glasma beyond the boost-invariant limit and take the longitudinal structure of the colliding nuclei into account. I will present our results for Pb+Pb and Au+Au collisions at various energies.