In the past two decades, dislocation mechanics at diffusive time scales has been modeled independently using the phase field crystal (PFC) and the field dislocation mechanics (FDM) approaches. PFC is a particular class of phase-field approaches in which the order parameter describes the temporally coarse-grained atomic density of a crystal at microscopic lengths, capturing defects such as dislocations in a natural manner. However, despite recent advancements, its description of elasticity is highly restricted, which is problematic to study dislocation dynamics. The aim of this work is to couple PFC with FDM to incorporate elasticity within the phase field evolution. FDM is the state-of-the-art theory for modeling dislocation mechanics, that naturally allows for a constitutive prescription of crystallography but requires external guidance to do so. Therefore, PFC and FDM are complementary to each other. Recently, Acharya and Viñals [1] proposed a theoretical coupling of these complementary models to provide a pathway for modeling elasto-statics, dynamics and interactions of crystallographic dislocations at diffusive timescales. Then, Upadhyay and Viñals [2] developed a one-way (weak) numerical coupling between the two models in an elasto-static setting and clearly demonstrated the need for such a coupling. Backed by these preliminary developments, in this work, a finite element-based numerical implementation of the strongly coupled PFC and FDM model, called the crystallographic dislocation mechanics (CDM) model, is first presented, followed by the demonstration of the advantages of this coupling in predicting dislocation statics and dynamics. References [1] Acharya, A., Angheluta, L. & Vi˜nals, J. Elasticity versus Phase Field Driven Motion in the Phase Field Crystal Model. Modelling And Simulation In Materials Science And Engineering. 30, 064005 (2022). [2] Upadhyay, M. & Vi˜nals, J. Coupling Phase Field Crystal and Field Dislocation Mechanics for a Consistent Description of Dislocation Structure and Elasticity. European Journal Of Mechanics A/Solids. 108 pp. 105419 (2024).