Why did Anderson decided to unify his forces in Charleston and put them in one fort?

Anderson decided to unify his forces in Charleston and consolidate them into one fort primarily for strategic reasons. By concentrating his troops at Fort Sumter, he aimed to strengthen his defensive capabilities against potential Confederate attacks, ensuring that his limited resources were deployed more effectively. This decision also facilitated better supply management and communication among his forces, which was crucial in a tense and rapidly evolving military situation.