US troops navigate snow and ice during the battle on Attu in May, 1943.  Public domain as Crown copyright lasts 50 years in Australia.
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c. May 1943
Downloaded from Australian War Memorial site:  <a rel="nofollow" class="external autonumber" href="http://cas.awm.gov.au/TST2/cst.acct_master?surl=1628680599ZZVRNEREVHOD07623&amp;stype=3&amp;simplesearch=&amp;v_umo=&amp;v_product_id=&amp;screen_name=&amp;screen_parms=&amp;screen_type=RIGHT&amp;bvers=4&amp;bplatform=Microsoft%20Internet%20Explorer&amp;bos=Win32">[1]</a>