 Complete the following phrase:  Depending on its type, each brigade includes two to five Cavalry or Infantry Regiments, one or two Artillery Groups, a scout cavalry squadron, one battalion or company-sized engineer unit, one intelligence company, one communications company, one command company and a battalion-sized logistical support unit. The terms regiment and group, found in the official designations of cavalry, infantry and artillery units, are used due to historical reasons. During the 