Here's an interesting Army aviation patch, designed and worn by B Company, 2nd BN 238th Aviation in Afghanistan during 2009. This was a National Guard CH-47 unit, but the operated as part of a Aviation Battalion Task Force from the 101st Aviation Brigade, 101st Airborne Division. They were based at FOB Salerno in Eastern Afghanistan and in direct support of 4th Brigade Combat Team (Airborne), 25th Infantry Division.
The photo below shows a CH-47 from this unit sling loading a howitzer from FOB Salerno in April 2009.
