their conquest of Surabaya
... that during their conquest of Surabaya, Mataram forces dammed the Brantas River to limit water supply to the city of Surabaya?
... that during <b id="mwBNg"><a href="./Mataram_conquest_of_Surabaya" id="mwBNk" rel="mw:WikiLink" title="Mataram conquest of Surabaya">their conquest of Surabaya</a></b>, <a href="./Mataram_Sultanate" id="mwBNo" rel="mw:WikiLink" title="Mataram Sultanate">Mataram</a> forces dammed the <a href="./Brantas_River" id="mwBNs" rel="mw:WikiLink" title="Brantas River">Brantas River</a> to limit water supply to the city of <a href="./Surabaya" id="mwBNw" rel="mw:WikiLink" title="Surabaya">Surabaya</a>?