  The La-based '214' cuprates host several symmetry breaking phases including
superconductivity, charge and spin order in the form of stripes, and a
structural othorhombic-to-tetragonal phase transition. Therefore, these
materials are an ideal system to study the effects of uniaxial stress onto the
various correlations that pervade the cuprate phase diagram. We report resonant
x-ray scattering experiments on
$\textrm{La}_{1.475}\textrm{Nd}_{0.4}\textrm{Sr}_{0.125}\textrm{Cu}\textrm{O}_{4}$
(LNSCO-125) that reveal a significant response of charge stripes to uniaxial
tensile-stress of $\sim$ 0.1 GPa. These effects include a reduction of the
onset temperature of stripes by $\sim$ 50 K, a 29 K reduction of the
low-temperature orthorhombic-to-tetragonal transition, competition between
charge order and superconductivity, and a preference for stripes to form along
the direction of applied stress. Altogether, we observe a dramatic response of
the electronic properties of LNSCO-125 to a modest amount of uniaxial stress.
