The long-awaited 30-day review of the U.S. strategy to defeat the Islamic State ordered by President Trump is nearly complete, with the final draft expected to be delivered to the White House early next week, according to the Pentagon.

Looking to keep his campaign promise to initiate a plan to destroy the Islamic State, Mr. Trump tasked the Defense Department with spearheading an interagency review of the Obama-era strategy, which he said failed to deliver results in a timely manner.

The plan for the Islamic State will be a major early test for Mr. Trump's national security adviser, H.R. McMaster. Named to the post on Monday, Mr. McMaster replaces retired Army Gen. Michael Flynn, whose abrupt resignation over Russian ties threw the administration's national security team into a tailspin.