WASHINGTON — A war averted more than a decade ago may be pointing the way toward 21st-century warfare for the U.S. Navy. In September 1994, a U.S. flotilla positioned itself off the coast of Haiti to help restore a democratically elected president to power. The flagship, the aircraft carrier Dwight D. Eisenhower, was stripped of its fighter planes and turned into a landing hub for Army helicopters and barracks for 2,000 soldiers. Operation Uphold Democracy, as it was called, ended in a few weeks and the Norfolk-based Eisenhower headed to the Mediterranean for a more conventional deployment. But Navy leaders...