
Sikh teachings about war and peace are based on the Guru Granth Sahib and the teachings of the ten human Gurus. Sikhs believe that if a justifiable war should take place even if it cannot be won.
Sikhism does not teach total pacifism but approves of any action to promote human rights and harmony.
Guru Nanak (the first Guru) wrote:
No one is my enemyNo one is a foreignerWith all I am at peaceGod within us renders usIncapable of hate and prejudice