It's been almost a month since the 60th anniversary of the outbreak of the Korean War, which started June 25, 1950 with the North Korean invasion of South Korea. Though the war lasted about three years, most of the memorable action happened during the first 8-9 months.
By July 5, 1950, the North had taken Seoul and was marching southward. UN troops first engaged in battle at Osan on this hill now marked with a memorial:

By July 22 (sixty years to the day before my posting of this message now), the North had overrun Daejeon and was beginning to march south toward Busan, trying to finish the war off before UN troops could mobilize sufficiently.
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Here are a couple books recommended to me by my "Korean history mentor"
I read this book at the beginning of the year, too. It focuses on the hot summer months of 1950:
If you haven't read at least one history of the Korean War, this is the time to do it!
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There are currently two serials on Korean TV which dramatize the Korean War from a Korean perspective:
I've been watching Comrade in Arms, which seems to be weaving two plots together: the story of a group of South Korean soldiers, and also the story of several soldiers fighting for the North. It's interesting to see the perspectives Korean writers take as they emphasize things that non-Korean writers often overlook, such as broken families, soldiers switching sides, etc. I've been surprised to see how the soldiers fighting for the North are portrayed as kind and sincere, too.
In reading/watch about the Korean War, I am often struck by the differences of perspective. Non-Korean writers tend to ignore the contributions of the South Korean army to the war effort; but you'll find none of that when portrayed by Koreans. In fact, the two Korean TV serials appear to have no non-Korean actors at all.
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Excerpts of the book have been published daily in the Jungang Ilbo this year and the refreshing aspect of General Baek's perspective is that he seems to have fought in a remarkably diverse range of situations during the war and served as a go-between with the UN forces. So, this book is full of first-hand accounts and frequently makes reference to both the contributions of the South Korean soldiers. General Baek doesn't short-change in any way the absolutely decisive role of the UN, though.
This is also a remarkably sturdy hardcover book, with lots of photos and maps.