In this story, one of the main events could be that the great big enormous rock held some sort of mystery. It could have had strange markings on it. So, people from different places came to study it. There might have been a conflict between those who wanted to preserve the rock as it was and those who wanted to break it open to find out what was inside. This conflict and the process of trying to solve the mystery of the rock could be the main events of the story.
It's probably about some sort of battles or competitions using boxes. Maybe it's a creative and fun event where people build structures with boxes and then have some kind of war - like contests with them.
The main events include Paris of Troy stealing Helen from Menelaus of Sparta, which led to the Greeks' decision to launch an attack on Troy. There was the long siege of Troy. Also, the famous Trojan Horse, which was a large wooden horse that the Greeks used to deceive the Trojans. They hid soldiers inside it, and when the Trojans brought the horse into the city, the Greek soldiers emerged and attacked Troy from within.
Well, in the trade wars story, one main event was the increase of tariffs on imported goods by some major economies. For example, the US imposed tariffs on steel and aluminum imports from various countries. This led to retaliatory tariffs from other nations. Another event was the disputes over intellectual property rights, which also contributed to the intensification of the trade wars.
One main event is the initial Covenant attacks on UNSC colonies. This forces the UNSC to mobilize their forces. Another event is the discovery of important strategic locations during the battles, which both sides fight over. Also, the development of new military tactics by the UNSC in response to the Covenant's aggression is a significant part of the story.
As I don't know the Tibiream Wars story, I can't list the main events. Maybe it has an event where a crucial stronghold is captured, or a significant character is assassinated.
It could be two artists who use cardboard as their medium. They might be main characters in a 'cardboard love story' where their shared passion for creating art with cardboard leads to love. Maybe they collaborate on a big cardboard installation and during the process, they fall in love with each other's creativity and then with each other.
The main events include the rise of the Empire under Palpatine. Then there's Luke Skywalker's journey to become a Jedi. Also, the destruction of the Death Star by the Rebels is a major event.
The Clone Wars are a major part. It was a huge galactic conflict that led to the rise of the Empire. Also, Anakin's turn to the dark side and his fight against Obi - Wan on Mustafar was a crucial event. Then in the sequel trilogy, the emergence of the First Order and the Resistance's fight against it are key events.