This is a long chapter that addresses the nature of general frontal dynamics as manifested in a frontal model that has virtually no dynamical constraint. The discussions are based on three investigations using a high-resolution Advanced Research Weather Research Forecasting model that is run in the non-hydrostatic mode including diabatic heating. The basic state is a realistic baroclinic jet straddling across a dynamic tropopause. Quite realistic surface cold front and warm front as well as an upper-level front are simultaneously simulated. They are shown to be integral parts of an intensifying synoptic baroclinic wave. We particularly investigate why cold fronts are characteristically much narrower, longer and more intense than the warm fronts. We delineate the structural and dynamical properties of the model upper-level front. We show that while the appropriate metric of surface frontogenesis is D/Dt |∇_2 θ|, the metric for upper-level frontogenesis is D/Dt |∇θ|, where ∇_2 and ∇ are 2D and 3D gradient operators respectively. We finally investigate whether, how, and why upper-level front could synergistically interact with a surface cold front.