World War I battle (5)
(Other definitions for somme that I've seen before include "bloody fight" , "WW1 battlefield" , "WWI battle site" , "European river" , "World War I battlefield around French river" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">world war i battle</span>' is the definition.<br/ ><span class="explanation-format__explanation">(1914 battle in World War One)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for ypres that I've seen before include "WWI battlefield" , "scene of battle" , "WW1 battle site" , "WW1 battle town" , "WW One battle site" .)