why did grant not want his troops to celebrate the surrender of the Confederate troops

it could bring surprise attacks on the north
it would not help it unifying the nation again
it would cause his troops to view southerners as countrymen
it would cause the south to revoke their surrender

The main reason Grant did not want his troops to celebrate the surrender of the Confederate troops was because it would not help in unifying the nation again. Grant understood that celebrating the surrender could further deepen the divisions between the North and the South, making it harder to reconcile and rebuild the nation. He aimed to promote reconciliation and healing, and believed that celebrating the surrender might hinder that process.

just choose one

Grant did not want his troops to celebrate the surrender of the Confederate troops because it would not help in unifying the nation again.