Original sentence: " The lack of a vigorous response had led the Navy to conclude that their bombardment had suppressed the Japanese defenses, and the Marines had initially begun deployment to the Iwo Jima beach in good order.After allowing the Americans to concentrate men and machinery on the beach for just over an hour, Kuribayashi engaged his countermeasures.Shortly after 10:00, machine guns, mortars, and heavy artillery began to rain down on the crowded beach
Edited sentence: " The lack of a vigorous response had led the Navy to conclude that their bombardment had suppressed the Japanese defenses as the Marines began deployment to the Iwo Jima beach in good order.After allowing the Americans to concentrate men and machinery on the beach for just over an hour, Kuribayashi unleashed the full force of his countermeasures.In the deathly silence, the landed US Marines began to slowly inch their way forward inland.Shortly after 10:00, everything from machine guns and mortars to tanks and heavy artillery began to rain down on the crowded beach, which was quickly transformed into a nightmarish bloodbath