Montesquieu concluded that the best form of government was one in which the legislative, executive, and judicial powers were separate and kept each other in check to prevent any branch from becoming too powerful. He believed that uniting these powers, as in the monarchy of Louis XIV, would lead to despotism.
The main advantage was that it was an enclave in a Confederate city, which means that it was small and surrounded by Confederate forces from all sides, which enabled them to quickly attack it all at once and win with ease. The Sumter forces couldn't call for reinforcements or defend properly or even escape so they had to lose eventually.
B) Sam Houston
Sam Houston (1793-1863), as an American soldier and politician, was the one in charge of leading the Texas militia to the battle of San Jacinto (April 21, 1836) and gaining the victory, even though their army was almost half the size of the Mexican's army led by General Antonio Lopez de Santa Anna. The Texans took as prisoners hundreds of Mexicans including, Santa Ana, which in exchange of his freedom, he signed a treaty recognizing Texas’ independence.
After the triumph, Houston was elected as the first President of Texas.