Battle timer

Once the attacks on a city have produced enough contribution to fill the first section of the contribution bar, a timer will automatically start. This battle timer limits the time in which the city has to be liberated.If the players fail to fill the bar completely before the timer runs out, the Wehrmacht Elite Divison will arrive from the nearest capital and push back the allies, resulting in the contribution bar being completely emptied.
 * Smaller cities lose their battle timer once the capital they are supporting is liberated
 * Capitals lose their battle timer only when the frontline has moved far away from them.
 * It is save to make contribution in the first section of the contribution bar, but once it is reached, the timer will automatically start