Wars always bring destruction, it destroys communities and families and often disrupts the development of the social and economic fabric of nations. There are a lot of negative effects following are there;

The effects of war include long-term physical and psychological harm to children, families,and adults.

War results in the destruction of communities and nations' economies.

Death, injury, sexual violence, malnutrition, illness, and disability are some of the most threatening physical consequences of war, while post-traumatic stress disorder,depression, and anxiety are some of the emotional effects.

https://www.apa.org/international/united-nations/un-matters/rathi-war.pdf