I know that sometimes Wikipedia isn’t completely reliable as an encyclopedia. But I’ve been checking out the Timeline of Korean History they have and it seems to be fairly well documented. So I thought I would share it.
It begins with the most ancient references or discoveries on the Korean peninsula and goes through 2012. What a great resource when someone (me!) is having to build their own Korean history curriculum for a first grader.
Here are another couple of resources for early Korean history:
Ohio State University has several pages on this site about Korean history. http://people.cohums.ohio-state.edu/bender4/eall131/EAHReadings/module02/m02korean.html
5,000 Years of Korean Martial Arts: The Heritage of the Hermit Kingdom Warriors by R. Barry Harmon (you can get a sneak peak by following this link to Google Books http://books.google.com/books?id=tZbVl-Cd-SgC&pg=PA17&lpg=PA17&dq=korea+Yemak+and+Puyo&source=bl&ots=vhT7qYZTy3&sig=4hAylZ9MaaTB_ksSjGqeOYUZz2I&hl=en&sa=X&ei=-shAUYDvA8TbyAHA8ICQCQ&ved=0CE4Q6AEwBA#v=onepage&q=korea%20Yemak%20and%20Puyo&f=false