After <a href="https://en.wikipedia.org/wiki/German_reunification" id="mw8g" rel="mw:WikiLink" title="German reunification">German reunification</a>, the <a href="https://en.wikipedia.org/wiki/Germany" id="mw8w" rel="mw:WikiLink" title="Germany">Federal Republic of Germany</a> and Poland sign a <a href="https://en.wikipedia.org/wiki/German–Polish_Border_Treaty" id="mw9A" rel="mw:WikiLink" title="German–Polish Border Treaty">treaty</a> confirming the <a href="https://en.wikipedia.org/wiki/Oder–Neisse_line" id="mw9Q" rel="mw:WikiLink" title="Oder–Neisse line">Oder–Neisse line</a> as the border between Germany and Poland.