sentences:  These operations were named Operation Provide Promise, Operation Joint Endeavor, Operation Joint Guard and Operation Joint Forge.Members of the 180th along with operations support and maintenance personnel would deploy to Rhein-Main Air Base and, after it closed, to Ramstein Air Base and assigned to "Delta Squadron".The Air National Guard would generally be responsible for a 90- or 120-day period and guard members would typically volunteer for duty for a minimum of a two- to three-week period although some would volunteer for longer periods.