Complex sentence: The Military of South Sudan is known as the South Sudan Defense Forces (SSDF) or formerly known as the "Sudan People's Liberation Army" ("SPLA") is the new reorganized military of the Republic of South Sudan.
Split into simpler sentences: The Military of South Sudan is known as the South Sudan Defense Forces (SSDF) or formerly known as the "Sudan People's Liberation Army" ("SPLA"). It became the new reorganized military of the Republic of South Sudan.