In 1984, what crime does the main character commit, how does he do it, and what is the punishment?

Because of his position in the Outer Party, his government expects absolute compliance
in everything Winston says, does, and believes in. That means embracing the Party
slogan:

War is peace, freedom is slavery, ignorance is
strength.

Because of his job as a records editor at the
Ministry of Truth, Winston is acutely aware that the truth the Party hands its citizens day
after day has been heavily altered, sometimes to the point that neither he nor anyone else can
even remember what the original and accurate history is. One day, he grabs a journal and writes
"DOWN WITH BIG BROTHER," and he realizes that his fate for such thoughtcrime
(holding thoughts that do not support the tenets Big Brother has set forth) is
sealed. After he meets, the two engage in increasingly risky behavior, such as meeting for sex
outside of a Party-approved marriage for the purposes of procreation. Winston increasingly
begins to consider the actual history of his country and wants to find a way to overthrow
Big...