<span>There were frequent crop failures due to lack of rain. </span>
I would go with True because any historian needs a lot of patience to get what they want or to learn about something etc..
The insistence of the United States on her trading rights was also important. Soon after the war began Britain, France, and their allies set up a naval blockade of Germany and Austria. Even food was contraband. ... Surely, the Americans argued, international law protected the right of one neutral to trade with another.