China Maritime Studies Institute – “Stand-In Forces” (SIF) is an operational concept proposed by the United States Marine Corps (USMC) within the context of strategic transformation, emphasizing the development of combat forces capable of sustained forward presence within the “weapons engagement zone” (WEZ). These forces can conduct surveillance and reconnaissance, gain long range target custody, and engage in interference, deception, littoral zone harassment, rapid littoral strike, sustainment, protection, and security operations, as well as other actions to address changing conditions and challenges. To counter the continuous penetration and encroachment into our near seas, we must proactively engage and establish effective countermeasures. We must focus on addressing weaknesses and enhancing our amphibious systems warfare advantages; prioritize innovation and advancement to accelerate the development of maritime unmanned combat capabilities; and emphasize advancing the establishment of cyber- and information systems to address our core priorities.