  We have studied the directed flow of light-flavor hadrons for Au + Au
collisions at $\sqrt{S_{NN}}=$ 7.7 - 200 GeV. The initial condition is taken
from a suitable Glauber model which is further evolved within the framework of
relativistic hydrodynamics. Model calculations of the rapidity-odd directed
flow ($v_1$) of identified light-flavor hadrons are compared with the available
experimental data after suitably calibrating the initial condition to describe
the rapidity dependence of charged particle multiplicity and net-proton yield.
For reasonable choice of the initial condition, we are able to describe the
measured rapidity and beam energy dependence of identified hadron $v_{1}$
including the observed $v_1$ splitting between baryons and anti-baryons.
