  We apply the technique of sequential deconfinement to the four dimensional
$\mathcal{N}\!=\!1$ $Usp(2N)$ gauge theory with an antisymmetric field and $2F$
fundamentals. The fully deconfined frame is a length-$N$ quiver. We use this
deconfined frame to prove the known self-duality of $Usp(2N)$ with an
antisymmetric field and $8$ fundamentals. Along the way we encounter a
subtlety: in certain quivers with degenerate holomorphic operators, a naive
application of Seiberg duality rules leads to an incorrect superpotential or
chiral ring.
  We also consider the reduction to $3d$ $\mathcal{N}\!=\!2$ theories,
recovering known fully deconfined duals of $Usp(2N)$ and $U(N)$ gauge theories,
and obtaining new ones.
