What are the major events that happen in chapters 1-5?

Chapters 1-5 of Unbroken give the
necessary background of Louis Zamperini before he entered the military.  In chapter 1
there are details of his childhood and family.  He was the second of four children in
his Italian immigrant family, and by far the most unruly.  As a child, he constantly
dared to do things which most kids would avoid, either for fear of punishment, fear of
getting hurt or killed, or from a simple lack of creativity to come up with the kind of
ideas Louis thought about all day.  He was a practical jokester and thief, among other
things, and because he was small for his age, instead of fighting, he most often ran
from his adversaries.

In chapter 2, his older brother Pete
(Louis' exact opposite in kindness, behavior, respect for authority, and desire to
succeed) decides to take Louis under his wing and hone his rebellion and propensity for
running into something positive.  He forces Louis to join the track team at school, then
undertakes the task of personally training him into
success.

As Louis begins to feel the attention and positive
praise he was always seeking with bad behavior, chapter 3 outlines his very rapid ascent
into running success.  He makes up his mind that he will become a world class runner. 
After breaking several high school and collegiate records, Louis qualifies for the
Olympic trials, and then makes the team.

Chapter 4 follows
Louis to the 1936 Olympics in Germany, and Louis' first taste of the Nazi's (which
wasn't altogether terrible).  Though he does not medal in these Olympics, he does far
better than anyone expected him to, given his age, inexperience, and short training.  He
leaves with his heart set on the 1940 games in Tokyo.

In
Chapter 5, the conclusion to Part I of the book, Louis returns to finish college at
USC.  He continues to run and to train, but when he hears the news of the war, the
United States' participation in it, and finally, the cancellation of the 1940 Olympics,
he decides to join the Air Force.  This is where Part II of the book picks
up.