When the first rumblings of the Civil War reached Savannah, reaction wasn’t what most would imagine. It meant huge rallies in Johnson Square, elaborate uniforms, and parades with proud Southerners who would sometimes take excursions to battle sites to watch the action, said Michael Jordan, the president of Cosmos Mariner Productions. Jordan has produced many historical films and documentaries including “Savannah’s Famous Ships” and “In the Footsteps of Juliette.”