The Battle Grounds 2 and Battle Grounds 3(BG3) are Half-Life 2 multiplayer modifications based on the American War of Independence (1775-1783). The British Army and its Native American tribal allies engage in battle against the United States Continental Army and militia forces. Take aim and fire muskets, prepare bayonets and take control of the battlefield to succeed in your campaign for final victory. Combat will vary from long-range rifle marksmanship to brutal close quarters hand-to-hand melee fighting. You will need a mix of first person combat skills and quick-thinking strategy to survive. So prepare yourself to do battle for your side and to meet the enemy head-on. Only one side can be victorious.
Screenshots from the completely revised map running under development builds of Battle Grounds 2. The map now features the setting of a small fictional settlement on hillside with buildings scattered nearby and a small wheat field. A church, a villa, a cottage and a house are spread out on the map.
Nice... what does the flag represent?
xD
It's one of the several new flag skins added in 1.5a (credits to the person who made all the high res skins for us, I don't remember his name right now). The Americans did not have a unified flag throughout the war and have flown various banners. The most famous one is the Gadsden flag reading "Don't tread on me".
En.wikipedia.org
The Britsh also have a naval flag option with a new skin.