US Army Engineer Command, Europe (Source: Walter Elkins) ANNEX "B", which served as Headquarters Building for USAENGCOMEUR until destroyed by a fire in 1968. The O&T (Operations and Training) offices were located on the second floor just to the right of the left entrance. On the other side of the stairs were the P&I (Plans and Intelligence) offices - these were the two elements of the Operations Directorate.