sentences:  Due to the president frequently shifting the organization and assignments of senior commanders and chiefs of staff, as well as the lack of official documents recording them, putting together a complete picture of the structure of the Eritrean Army is difficult and largely relies on reports from former senior military officers.In February 1991 the divisions of the EPLA were subordinated to four corps, the 161st, 271st, 381st, and 491st.During the 1990s there were a total of 24 divisions.