  We investigate a model of dark sector based on non-Abelian $SU(2)_D$ gauge
symmetry. This dark gauge symmetry is broken into discrete $Z_2$ via vacuum
expectation values of two real triplet scalars, and an $SU(2)_D$ doublet Dirac
fermion becomes $Z_2-$odd particles whose lighter component makes stable dark
matter candidate. The standard model and dark sector can be connected via the
scalar mixing and the gauge kinetic mixing generated by higher dimensional
operators. We then discuss relic density of dark matter and implications to
collider physics in the model. The most unique signatures of this model at the
LHC would be the dark scalar ($\Phi_1^{(')}$) productions where it subsequently
decays into : (1) a fermionic dark matter ($\chi_l$) and a heavy dark fermion
($\chi_h$) pair, $\Phi_1^{(')} \to \bar \chi_l \chi_h(\bar \chi_h \chi_l) $,
followed by $\chi_h$ decays into $\chi_l$ and non-Abelian dark gauge bosons
($X_i$'s) which decays into SM fermion pair $\bar f_{SM} f_{SM}$ resulting in
the reaction $p p \rightarrow \Phi_1^{(')} \rightarrow \bar \chi_h \chi_l (\bar
\chi_l \chi_h) \to f_{SM} \bar f_{SM} \chi_l \bar \chi_l $, (2) a pair of
$X_i$'s followed by $X_i$ decays into a DM pair or the SM fermions resulting in
the reaction, $p p \rightarrow \Phi_1^{(')} \rightarrow X_i X_i \rightarrow
\bar \chi_l \chi_l f_{SM} \bar f_{SM}$ or even number of $f_{SM} \bar{f}_{SM}$
pairs.
