In the early 19th century sailing ships<span> took about six weeks to </span>cross the Atlantic<span>. With adverse winds or bad weather the journey could </span>take<span> as </span>long<span> as fourteen weeks. i hope this helps</span>
Merchants and traders who travel along these routes must stop at oases to replenish food and water supplies and this means that whoever controls an oasis also controls the trade along the route—making oases desirable to political, economic, and military leaders.
