In a recent publication it was shown that ion implantation is possible for solid electrolytes and given a tentative stress value of -3-20 GPa in LLZO, depending on the dosage of implanted Xenon ions, retrieved from the examination of grazing incidence XRD data and molecular dynamics simulations. It has to be noted that the implantation depth in Yao et al is rather shallow, calculated at up to 60 nm and is below the common defect size in the sub µm size, as also mentioned by Yao et al. Furthermore, in situ plating of lithium in a TEM measurement showed fracture of "defect free" single crystalline LLZO from the local stresses generated by lithium ions, reaching up to GPa levels. This study reveals that stress states in the near surface region up to 1 µm depth and up to -700 MPa can be introduced into Li6.4La3Zr1.4Ta0.6O12 (LLZTO) by ion implantation. Such a high stress is introduced by an Ag-ion concentration lower than 0.003 at% in the LLZTO matrix and accompanied by the amorphization of the top 650-700 nm of LLZTO. Since the stressed zone is significantly deeper than the typical defect size mechanically introduced cracks have been shown to be deflected perpendicular to the indentation direction. Finally, we demonstrated that the same is true for dendrites with respect to the penetration direction, which opens a new avenue to designing "dendrite-free" solid-state electrolytes for high power and energy dense solid-state batteries.