This is What happens

The 13 districts were furious with the way that the Capitol was treating them. They rebelled against the capitol, hoping to take over and live freely. However, the great rulers were too powerful for the districts and took them down, many people dying in the war. The Capitol remained in power, forcing the districts to retreat.  To make sure that the occurrence did not happen again, the Capitol put in the Hunger Games. This is the effect is the uprising.

The cause of this effect is the Hunger Games. Katniss’ sister gets elected to the Hunger Games, Prim, and Katniss volunteered as tribute. The story goes on as Katniss goes to win the Hunger Games, victorious with her crossed lover Peeta.