According to the bipartisan House select committee that investigated the incident, the attack was the culmination of a plan by Trump to overturn the election.

Within 36 hours, five people died: including a police officer who died of a stroke a day after being assaulted by rioters and collapsing at the Capitol.

Many people were injured, including 174 police officers. Four officers who responded to the attack died by suicide within seven months. Damage caused by attackers exceeded $2.7 million. It is the only attempted coup d'état directed towards the Federal government in the history of the United States.

https://en.wikipedia.org/wiki/January_6_United_States_Capito...