The United States Marine Corps (USMC) was established on November 10, 1775, as the Continental Marines to serve as shipboard infantry and provide security aboard naval vessels. Founded during the American Revolutionary War, their initial role involved ship-to-ship fighting, enforcing discipline, and conducting amphibious raids, such as their first amphibious assault in the Bahamas in 1776. After disbanding in 1783 post-war, the Corps was re-established in 1798 and has since served in every major U.S. conflict[1][2][5]. The Marines have historically specialized in amphibious warfare, playing a pivotal role in U.S. military strategy, especially during World War II in the Pacific Theater. They were instrumental in key battles including Guadalcanal, Tarawa, Iwo Jima, and Okinawa, where their combat effectiveness and tenacity were widely recognized. The iconic image of Marines raising the American flag on Iwo Jima symbolizes their valor. The Corps expanded significantly during this period, growing to multiple divisions and air wings, aided by innovations such as the Navajo code talkers[1][3][5]. As a branch of the Department of the Navy since 1834, the Marine Corps combines naval and ground combat capabilities, enabling rapid expeditionary response worldwide. Their mission has evolved from shipboard security to encompassing seizing and defending advanced naval bases, expeditionary warfare, and crisis response. Marines have served in diverse roles including counter-piracy, protection of U.S. interests abroad, and joint operations with other military branches[1][3][4]. Today, the USMC remains a key component of U.S. national defense, known for its readiness, discipline, and expeditionary capabilities. It continues to adapt to modern warfare demands while honoring its historic legacy as "first to fight"[8]. Recent events and ongoing deployments reflect the Corps’ continuing relevance in global security and rapid response missions.