Those signing on to the US-backed coalition to protect commercial shipping in and around the Strait of Hormuz will be doing most of the work, a top Navy officer told Senators Tuesday.

Vice Adm. Michael Gilday told members of the Senate Armed Services Committee that the coalition pitched 10 July to ensure freedom of navigation in the politically sensitive, economically critical region would be "an 80 or 90 percent coalition effort and a much smaller US effort."