  One of the most famous quantum systems with topological properties, the spin
$\mathcal{S}=1$ antiferromagnetic Heisenberg chain, is well-known to display
exotic $\mathcal{S}=1/2$ edge states. However, this spin model has not been
analyzed from the more general perspective of strongly correlated systems
varying the electron-electron interaction strength. Here, we report the
investigation of the emergence of the Haldane edge in a system of interacting
electrons -- the two-orbital Hubbard model -- with increasing repulsion
strength $U$ and Hund interaction $J_\mathrm{H}$. We show that interactions not
only form the magnetic moments but also form a topologically nontrivial
fermionic many-body ground-state with zero-energy edge states. Specifically,
upon increasing the strength of the Hubbard repulsion and Hund exchange, we
identify a sharp transition point separating topologically trivial and
nontrivial ground-states. Surprisingly, such a behaviour appears already at
rather small values of the interaction, in a regime where the magnetic moments
are barely developed.
