Every unit down to the company level has people standing guard, it’s SOP, those soldiers, sailors, Marines and airman should be armed. Right now just about all of them are walking around with no amno.
After the Ft. Hood shooting, the DoD clamped down on soldiers having access to military and personally owned weapons on post. All military personnel assigned to Ft. Hood are required to have their personally owned guns registered and stored in their unit’s arms room. that includes soldier who live off base, they are no permitted by new post regulations to have their personally owned guns in their off post housing, including the homes they own.
Bottomline: all soldiers have been disarmed and are not trusted to have weapons “to prevent another Maj Hassan.” The only personnel allowed to carry firearms and ammunition are the MPs.