Complex sentence: Following his graduation from the Naval Academy, he started his career with an assignment aboard the guided missile destroyer, followed by a Rhodes Scholarhip, majoring in Russian studies at Oxford University, during the same time future president Bill Clinton studied there.
Split into simpler sentences: Following his graduation from the Naval Academy, he started he was assigned to the guided missile destroyer. He then received a Rhodes Scholarhip, majoring in Russian studies at Oxford University, attending during the same time future president Bill Clinton studied there.