WASHINGTON -- A weapons sergeant with the 3rd Special Forces Group (Airborne) who heroically fought up a mountain through a barrage of enemy fire to help rescue his detachment members will receive the Medal of Honor.The White House announced today that Master Sgt. Matthew O. Williams went above and beyond the call of duty during an operation on April 6, 2008. Williams -- a sergeant at the time of the operation -- was assigned to Special Operations Task Force-33 in Afghanistan during Operation Enduring Freedom.Williams will receive the highest military award for valor at a White House ceremony, Oct. 30, 2019. A "Hall of Heroes" induction ceremony at the Pentagon is slated for Oct. 31, 2019.In April 2008, Williams joined 14 other Special Forces operators and roughly 100 Afghan commandos on a mission to take out or apprehend high-value enemy targets that were operating out of a mountain-top village within Shok Valley.Shortly after the joint force dropped into the area and organized into elements, the lead command and control team started their treacherous hike up a near-vertical mountainside toward the objective.It did not take long for the adversary to respond. A barrage of heavy sniper and machine-gun fire and rocket-propelled grenades rained down on the team's location.In the ensuing chaos, the lead element was pinned down at a higher elevation and isolated from the larger military force. Further, they had sustained injuries and were requesting support.In response, Williams organized a counter-assault team and led them across a waist-deep, ice-cold fast-moving river, and fought their way up the terraced mountain to the besieged lead element's location.Joined by his team sergeant, Williams positioned his Afghan commando force to provide a violent base of suppressive fire, preventing the enemy force from overrunning the team's position. In turn, the actions of Williams and his team allowed the first command and control element to consolidate and move the casualties down the mountain.As Williams worked to defend the force's position, an enemy sniper took aim and injured his team sergeant. With disregard for his safety, Williams maneuvered through an onslaught of heavy machine-gun fire to render aid.Once his team sergeant was secure, the joint team egressed off the mountainside. Williams descended with his team sergeant off a near-vertical 60-foot cliff to a casualty collection point and continued to provide first aid.With more injured Soldiers coming down the mountainside, Williams ascended through a hail of small arms fire to help with their evacuation, and also repair his operational detachment commander's radio.As Williams returned to the base of the mountain with three wounded Soldiers, enemy forces maneuvered to their position in an attempt to overrun the casualty collection point. Williams and the Afghan commandos quickly responded with a counter-attack and courageously fought back the attacking force.As the medical evacuation helicopter arrived, Williams exposed himself to insurgent fire again to help transport casualties. Once the injured were secure, Williams continued to direct Commando fires and suppress numerous enemy positions. The team's actions enabled the evacuation of the wounded and dead without further casualties.The entire Shok Valley operation lasted for more than six hours. During that time, Williams and the joint force fought back against about 200 adversaries, all while they were subjected to a series of friendly, danger-close air strikes.Williams is the second member of his detachment to receive the Medal of Honor for this operation. The president presented Staff Sgt. Ronald Shurer II the Medal of Honor at a White House ceremony Oct. 1, 2018.