If you're asking for just two random explorers, then Meriwether Lewis and William Clark. But im not really sure if thats what youre asking or not...
The Patriot victory at Saratoga<span> is often seen as the </span>turning point in the war<span>. Not only did it renew the morale of the American public, but it convinced potential foreign partners, such as France, that American could win the </span>war<span>, and that it might be in their best interests to send aid.</span>
Technology helped navigation for people because back a long time ago sailors had to see the wind and have to actually look and watch for what they were.Now that technology is made you can go to google maps and thats all it takes.