Põhja-Kõrvemaa Nature Reserve
... that Põhja-Kõrvemaa Nature Reserve, now a protected area in Estonia, used to be proving grounds used by the Red Army for military training during the Soviet Era?
... that <b id="mwAUc"><a href="./Põhja-Kõrvemaa_Nature_Reserve" id="mwAUg" rel="mw:WikiLink" title="Põhja-Kõrvemaa Nature Reserve">Põhja-Kõrvemaa Nature Reserve</a></b>, now a <a class="mw-redirect" href="./Protected_areas_in_Estonia" id="mwAUk" rel="mw:WikiLink" title="Protected areas in Estonia">protected area</a> in <a href="./Estonia" id="mwAUo" rel="mw:WikiLink" title="Estonia">Estonia</a>, used to be <a href="./Proving_ground" id="mwAUs" rel="mw:WikiLink" title="Proving ground">proving grounds</a> used by the <a href="./Red_Army" id="mwAUw" rel="mw:WikiLink" title="Red Army">Red Army</a> for military training during the <a href="./Estonian_Soviet_Socialist_Republic" id="mwAU0" rel="mw:WikiLink" title="Estonian Soviet Socialist Republic">Soviet Era</a>?