Why was chamberlain relived from service in November of 1863?

Chamberlain was relieved from service in November 1863 primarily due to the need for rest and recuperation after his severe injuries sustained during the Battle of Gettysburg. He had also completed his initial term of service, and there was a pressing need for his leadership in the regiment, which made him a candidate for reassignment. His effective leadership and bravery during the battle had earned him recognition, leading to his eventual promotion and continued service in the war.