Around 1835hrs Engine Co. 20 and 45 were to 1159 Mt. Zion Marlboro Rd in Anne Arundal County for the trailer fire.  Pumper/Tanker 9 ( Lothian ) and Engine Co. 20 arrived within seconds of one another with fire showing.  Chief 45A arrived on scene and setup the PG units command.  Chief 20A and  Engine Co. 20 laid a line from the road up the driveway to establish and water supply as the crew made entry with the lineman from 9 ( Lothian ) to make an interior attack.  Within minutes AA command pulled all units out and ordered a defensive operation.  Engine Co 45 arrived on scene , assisted with water supply and various fireground operations. Units returned to service around 2100hrs. 

About 3 hours after backing in the station the box was dropped for 13900 West End Farm Rd for the house bringing Engine Co. 45 , Tanker 45 , Engine Co. 20 and Truck Co. 20 along with surrounding units.  Units from Co. 45 arrived on scene with nothing evident. Chief 20B arrived on scene and setup command. As the Engine from 20 pulled up to the driveway to pick up 45s line and establish water supply the OIC from 45 reported a working fire in a 2nd floor bedroom.  As the crew from 20 stretched a back up line Truck Co. 20 went on scene and setup on side Alpha.  As Engine Co. 20 backed up 45 and checked the first floor the Truck Co. searched and assisted 45 on DIV 2 on the interior and threw ground ladder and placed the aerial in service on the exterior.  After quick work of the bedroom the incident was scaled back to only units from 20 and 45.