As the planet fell to the Covenant onslaught, the vessel made a blind Slipspace jump away from the Epsilon Eridani system, discovering the long-abandoned Installation 04. Some time during the event, several battalions were stationed on UNSC Pillar of Autumn. Throughout the course of the battle, the UNSC formed joint forces to combat against the overwhelming Covenant forces. The numerous campaigns and operations in which the ODSTs participated throughout the long war all pale in comparison to the Fall of Reach in 2552, during which countless ODSTs lost their lives defending strategic locations on the planet.ĭuring the initial invasion of Reach, a large contingent of 3,200 ODSTs participated in the Battle of Viery, assisting the UNSC Army in repelling the Covenant forces from the planet. They, in conjunction with SPARTAN-II Gray Team, would later defeat a Kig-Yar plan to trick the inhabitants of the Rubble out of their navigation data, which could compromise the location of Earth.Īs the Covenant-Human war progressed, the ODSTs would go on to participate in many engagements among these were the Battle of Jericho VII, an assassination mission on Heian, the Battle of Skopje, the Battle of Sigma Octanus IV, the Battle of New Jerusalem, the Battle of Tribute, and the Battle of Ariel. During one of these routine operations, a group of ODSTs aboard UNSC Midsummer Night were captured and taken to The Rubble.
Several ODST battalions joined UNSC Spirit of Fire 's rescue operation after retaking the planet and soon participated in the Battle of Shield 0459.įollowing the enactment of the Cole Protocol in 2535, ODST combat teams were tasked with boarding commercial and private vessels and purging their navigation databases. Having successfully kept Covenant forces from occupying the city, the Corps began launching multiple assaults on the Covenant's bases of operations to reclaim the planet. Not long after the Harvest Campaign, the ODSTs participated in the Battle of Arcadia where they assisted Marine forces and SPARTAN-II Red Team in defending the capital city from Covenant ground forces, thus allowing the evacuation of the civilian population. In 2526, ODST's were dropped onto Circinius IV to assist in the defense of the planet, but all were lost over the course of the battle. Although the planet was lost in the ensuing conflict, fortunately, the ODSTs were successfully extracted before the UNSC retreated. The Battle of Hat Yai marked one of the first deployments of ODSTs against Covenant ground forces. As humanity's military turned to meet the threat of the Covenant, divisions of ODSTs prepared to participate in the most critical engagements in the war and also to conduct the riskiest missions in the history of mankind.
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On November 1, 2525, the UNSC moved into a full alert status after the devastating and horrifying first contact with the Covenant at Harvest this marked a change in objectives for the ODSTs, who up until that point had been fighting the Insurrectionists. Human-Covenant war Main article: Human-Covenant war Early War In the years leading up to 2525, the ODSTs would once again conduct high risk operations against the Insurrectionists, to either stop the enemy before they could carry out attacks against supporters and officials of the Earth Government or to cut off major suppliers to the Insurrectionists. Using the ORIONs as exemplary models, the reputation of the ODSTs, as well as their training, was restored and enhanced as time passed. The first major combat re-emergence of the ODSTs occurred in 2490 during the beginnings of the civil conflict between the UEG and the Insurrection.
However, the conclusion of these conflicts in 2170, along with the signing of the Callisto Treaty and the subsequent years that followed, the ODSTs saw little action as more political, and more important issues such as overpopulation and famine and a massive military with no purpose gripped the postwar nations of Earth. Īt the conclusion of the Rainforest Wars and the Jovian Moons campaign, the Orbital Drop Shock Troopers were a fully established force and participated in every high risk operation during those conflicts. One of the names for these iterations were the "Drop Jet Platoons." Officially, the Orbital Drop Shock Trooper came into being in 2163. While the concept of dropping human soldiers from orbit had been around since the mid 21st century, the first iterations of the ODST weren't established until 2129.