How are these two events in this passage related? In April, a group of British soldiers had been searching for hidden weapons in the Massachusetts countryside, and some American colonists had confronted them. Nobody knows exactly how it started, but they began shooting at each other. People on both sides were killed. This led to several more battles. The Revolutionary War had begun.
The shootout in Massachusetts happened at the same time as the Revolutionary War.
The shootout in Massachusetts happened in the same place as the other battles.
The shootout in Massachusetts helped cause the Revolutionary War.

and your question what topic are you in trouble with?

in ray bradbury's short story "a sound of thunder", mr. eckels's fearfulness leads to drastic consequences for the rest of the world.

in the story, mr. eckels, who is a hunter, hires a time travel company to travel to the age of dinosaurs. although he is excited for the hunting expedition at the beginning, when they reach there and mr. eckels sees the tyrannosaurus, he feels frightened. as he is afraid of the tyrannosaurus, he steps off the path although he has been warned not to do it. by stepping off the path, the entire course of the future is affected: mr. eckart alters the future by stepping on a butterfly, which causes a new man to be elected president in the future. in that way, it is mr. eckart's fearfulness what triggers 'the butterfly effect' and what leads to drastic consequences for the rest of the world.