Complex sentence: She discover that Kubiak, Elizabeth and Vice President Andrew Nichols are working together, which she later figures out is to start a war between the U.S. and West-Angola by kidnapping Olivia to make Fitz declare a war.
Split into simpler sentences: She discover that Kubiak, Elizabeth and Vice President Andrew Nichols are working together. She later figures out that the goal is to start a war between the U.S. and West-Angola by kidnapping Olivia and force Fitz to declare a war.