ns, and dataset <code>"rpmcd"</code> for including map captions and dates in the plot.</p>
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<h3 id="political-division">Political division<a class="anchor" aria-label="anchor" href="#political-division"></a>
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<p>Plotting political divisions of the Roman Empire needs the <code>'type'</code> argument of function <code><a href="../reference/plot.map.html">plot.map()</a></code> as well.</p>
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