District 4 is a Career District. Its industry is Fishing. District 4 is presumably the least loyal Career district to the Capitol. This is most likely presumed because in the 75th Hunger Games, Finnick and Mags (the District 4 Tributes in that games) didn't ally with Ceareers, rather the rebels, also known as the allaince with Katniss Everdeen, Peeta Mellark, Johanna Mason, Wiress, Beetee, and Blight until he died.
70th Hunger Games