Chelsea Porterfield served in the United States Army as an MP during Operation Iraqi Freedom and Operation Enduring Freedom. She would eventually become a Sentinel at the Tomb of the Unknown Soldier at Arlington Cemetery. She became the first female Sergeant of the Guard. In September of 2021, she, along with 2 other female Sentinels, would stand watch over the Tomb as the first ever all female guards on duty. Her accomplishments are impressive and her story is fascinating.