WEBVTT 00:03.400 --> 00:06.269 On June 15 , 1944 , US Marines from the 00:06.269 --> 00:08.436 2nd and 4th Marine Divisions alongside 00:08.436 --> 00:10.547 the Army's 27th Infantry launched the 00:10.547 --> 00:12.658 Battle of Saipan , a critical step in 00:12.658 --> 00:14.658 the island hopping campaign and the 00:14.658 --> 00:17.200 fight across the Pacific . Landing on 00:17.200 --> 00:19.144 Saipan's southwest coast , Marines 00:19.144 --> 00:21.089 faced fierce resistance during the 00:21.089 --> 00:23.479 amphibious assault . By nightfall , US 00:23.479 --> 00:25.646 forces secured the beachhead , setting 00:25.646 --> 00:27.646 the tone for a hard-fought battle . 00:29.670 --> 00:31.726 The enemy used caves and trenches to 00:31.726 --> 00:33.948 launch surprise attacks , causing heavy 00:33.948 --> 00:36.170 American casualties . Despite this , US 00:36.170 --> 00:38.392 troops pushed forward and captured Olio 00:38.392 --> 00:40.559 airfield , a major strategic victory . 00:42.919 --> 00:44.919 As American forces advanced , enemy 00:44.919 --> 00:46.863 defenses collapsed . On July 7th , 00:46.863 --> 00:48.808 roughly 4000 combatants launched a 00:48.808 --> 00:51.030 final mass assault , later known as the 00:51.030 --> 00:52.252 Great Banzai Charge . 00:55.430 --> 00:58.150 By July 9 , 1944 , the US secured 00:58.150 --> 01:00.709 Saipan . Over 3000 Americans were 01:00.709 --> 01:02.820 killed and more than 10,000 wounded , 01:02.820 --> 01:04.876 ending one of the Pacific War's most 01:04.876 --> 01:07.069 brutal battles . Saipan proved that 01:07.069 --> 01:09.180 Pacific warfare would be a relentless 01:09.180 --> 01:11.347 war of attrition fought far beyond the 01:11.347 --> 01:11.449 beaches .