Why did Imam Hussain (AS) not allow Hazrat Abbas (A) to fight in Karbala? Given that after all attempts, it finally had to be a war and that chance to fight was given to all martyrs, why was Abbas (A) not allowed to fight?

Battle of KarbalaMartyrdomImam HusaynAl-Abbas ibn Ali
Why did Imam Hussain (AS) not allow Hazrat Abbas (A) to fight in Karbala? Given that after all attempts, it finally had to be a war and that chance to fight was given to all martyrs, why was Abbas (A) not allowed to fight?
Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 4 years ago

Hazrat Abbas (AS) was the chief commander of the army of imam Husain (AS) and he had to remain till the end of the battle.

Wassalam.