artillery of the Nguyen Lords
...that the artillery of the Nguyen Lords was so strong that cannons were placed at 4 m intervals along a 12 km defensive wall to repel the rival Trinh Lords of Vietnam?
...that the <b id="mwCpk"><a class="mw-redirect" href="./Artillery_of_the_Nguyen_Lords" id="mwCpo" rel="mw:WikiLink" title="Artillery of the Nguyen Lords">artillery of the Nguyen Lords</a></b> was so strong that <a href="./Cannon" id="mwCps" rel="mw:WikiLink" title="Cannon">cannons</a> were placed at 4<span id="mwCpw" typeof="mw:Entity"> </span>m intervals along a 12<span id="mwCp0" typeof="mw:Entity"> </span>km defensive wall to repel the rival <a class="mw-redirect" href="./Trinh_Lords" id="mwCp4" rel="mw:WikiLink" title="Trinh Lords">Trinh Lords</a> of <a href="./Vietnam" id="mwCp8" rel="mw:WikiLink" title="Vietnam">Vietnam</a>?