XBOX 360-History Channel: Civil War

General strategies
When you see an ally fighting hand-to-hand with the enemy, help him. Sometimes they will get killed and you could end up alone.
When you finish securing an area, reload your weapon. By doing this you will have a fully loaded weapon in case you are spotted by an enemy.
Reloading a weapon can be a time-consuming process. It pays to plan your reloading time and engage in hand-to-hand combat when facing a greater enemy force. Keep mobile and be aware of your perimeter when engaging.
One of the most important concepts in warfare, the high ground offers you a better vantage point and firing position.
When you are in a stealth mission, stay out of areas with lights and the enemy cannot see you. Note: If you fire a shot they will be able to spot you.
While shooting an enemy, move from side to side. This helps to avoid enemy bullets.
If you cannot see an enemy because of the trees, use your crosshairs. If it turns red, then you are aiming at an enemy. If it turns green, then you are aiming at an ally.
In the battlefield, you will find wagons, stone walls, and baskets. Use them as cover while you are reloading, getting suppressed, or low on health and looking for a medi-kit.
Achievements
Accomplish the indicated achievement to get the corresponding number of Gamerscore points:
Private (5 points): Kill 20 of your enemies.
Sergeant (15 points): Kill 50 of your enemies.
Lieutenant (50 points): Kill 100 of your enemies.
Captain (75 points): Kill 250 of your enemies.
Colonel (100 points): Kill 500 of your enemies.
General (125 points): Kill 750 of your enemies.
Pistoleer (50 points): Kill 100 of your enemies with your pistol.
Knife Master (50 points): Kill 75 of your enemies with your knife.
Melee Hero (30 points): Kill 50 of your enemies in close combat.
War Survivor (10 points): Complete the game on the Easy (or higher) difficulty setting.
War Veteran (20 points): Complete the game on the Normal (or higher) difficulty setting.
War Hero (30 points): Complete the game on the Hard difficulty setting.
Journalist (40 points): Find all secret photographs in the game.
Bookworm (40 points): Find all secret documents in the game.
Fredericksburg - Soldier (5 points): Complete the Fredericksburg mission.
Fredericksburg - Sharpshooter (10 points): Complete the Fredericksburg mission with an accuracy above 75%.
Fredericksburg - Deadeye (15 points): Complete the Fredericksburg mission with an accuracy above 95%.
Gettysburg - Soldier (5 points): Complete the Gettysburg mission.
Gettysburg - Sharpshooter (10 points): Complete the Gettysburg mission with an accuracy above 75%.
Gettysburg - Deadeye (15 points): Complete the Fredericksburg mission with an accuracy above 95%.
Chattanooga - Soldier (5 points): Complete the Chattanooga mission.
Chattanooga - Sharpshooter (10 points): Complete the Chattanooga mission with an accuracy above 75%.
Chattanooga - Deadeye (15 points): Complete the Fredericksburg mission with an accuracy above 95%.
Fort Fisher - Soldier (5 points): Complete the Fort Fisher mission.
Fort Fisher - Sharpshooter (10 points): Complete the Fort Fisher mission with an accuracy above 75%.
Fort Fisher - Deadeye (15 points): Complete the Fort Fisher mission with an accuracy above 95%.
Selma - Soldier (5 points): Complete the Selma mission.
Selma - Sharpshooter (10 points): Complete the Selma mission with an accuracy above 75%.
Selma - Deadeye (15 points): Complete the Selma mission with an accuracy above 95%.
Petersburg - Soldier (5 points): Complete the Petersburg mission.
Petersburg - Sharpshooter (10 points): Complete the Petersburg mission with an accuracy above 75%.
Petersburg - Deadeye (15 points): Complete the Petersburg mission with an accuracy above 95%.
Bull Run - Soldier (5 points): Complete the Bull Run mission.
Bull Run - Sharpshooter (10 points): Complete the Bull Run mission with an accuracy above 75%.
Bull Run - Deadeye (15 points): Complete the Bull Run mission with an accuracy above 95%.
Shiloh - Soldier (5 points): Complete the Shiloh mission.
Shiloh - Sharpshooter (10 points): Complete the Shiloh mission with an accuracy above 75%.
Shiloh - Deadeye (15 points): Complete the Shiloh mission with an accuracy above 95%.
Antietam - Soldier (5 points): Complete the Antietam mission.
Antietam - Sharpshooter (10 points): Complete the Antietam mission with an accuracy above 75%.
Antietam - Deadeye (15 points): Complete the Antietam mission with an accuracy above 95%.
Chancellorsville - Soldier (5 points): Complete the Chancellorsville mission.
Chancellorsville - Sharpshooter (10 points): Complete the Chancellorsville mission with an accuracy above 75%.
Chancellorsville - Deadeye (15 points): Complete the Chancellorsville mission with an accuracy above 95%.
Chickamauga - Soldier (5 points): Complete the Chickamauga mission.
Chickamauga - Sharpshooter (10 points): Complete the Chickamauga mission with an accuracy above 75%.
Chickamauga - Deadeye (15 points): Complete the Chickamauga mission with an accuracy above 95%.
Cold Harbor - Soldier (5 points): Complete the Cold Harbor mission.
Cold Harbor - Sharpshooter (10 points): Complete the Cold Harbor mission with an accuracy above 75%.
Cold Harbor - Deadeye (15 points): Complete the Cold Harbor mission with an accuracy above 95%.