  Using the boundary state formalism we study a moving D$p$-brane in a
partially compact spacetime in the presence of the background fields:
Kalb-Ramond $B_{\mu\nu}$, a U(1) gauge field $A_{\alpha}$ and the tachyon
field. The boundary state enables us to obtain interaction amplitude of two
branes with above background fields. The branes are parallel or perpendicular
to each other. Presence of the background fields, compactification of some
directions of the spacetime, motion of the branes and arbitrariness of the
branes' dimensions give a general feature to the system. Due to the tachyon
fields and velocities of the branes, the behavior of the interaction amplitude
reveals obvious differences from what is conventional.
