Hydrodynamic Ram refers to the high pressures that develop when a kinetic energy projectile penetrates a fluid reservoir bounded by a structural component. The accurate computational prediction of a hydrodynamic ram event has proven to be a difficult task due to the complex, nonlinear coupling that develops between the fluid and structure. The inherent flaw in current models for hydrodynamic ram are their inability to resolve this complex interaction. To alleviate the limitations of current computational analyses of hydrodynamic ram, the authors have begun to develop and apply state-of-the-art computational techniques to the prediction of hydrodynamic ram phenomena. However, to develop the confidence that these new models are predicting hydrodynamic ram effects, it is necessary to perform a series of benchmark simulations that allow for a systematic evaluation of the model. The purpose of this paper is to lay the foundation for the development of new models for hydrodynamic ram simulation. This paper presents a brief review of the physics of hydrodynamic ram phenomena, a review of the state-of-the-art in simulation of hydrodynamic ram events, and describes in detail some of the "test cases" in the hydrodynamic ram benchmark suite of problems.