Complex sentence: Engesa-Engenheiros Especializados S/A was a Brazilian company in the defense sector that specialized in producing armored fighting vehicles, including the EE-T1 Osório, EE-9 Cascavel and EE-11 Urutu.
Split into simpler sentences: Engesa-Engenheiros Especializados S/A was a Brazilian company in the defense sector. The company specialized in producing armored fighting vehicles, including the EE-T1 Osório, EE-9 Cascavel and EE-11 Urutu.