There is also a risk of interference by groups of anti-American student activists from the city’s university. DEFINE THE BATTLEFIELD ENVIRONMENT Our brigade (the 1st Brigade) is assigned responsibility for the center of the city. The threat directly opposite our sector is one mechanized infantry division. For example, they may time the start of the attack to force major engagements to take place just after midnight. But all sides involved in the conflict patrol the fringes of the contested area, and there are still occasional armed clashes.