Actually Obama increased the number of troops in Afghanistan shortly after taking office. Used a "Surge" similar to what was considered effective in Iraq. The actual troop decrease that has been taking place over the last 10 months is really just cutting the troops back to the level they were prior to the surge. We will be there for at least 12 years due to the agreement signed today. Now while we will be doing a lot of training and assisting, we will fight with them when asked. As someone who has worked side by side with the ANA, I see us doing a lot more fighting than training.