Complex sentence: Nevertheless, up to 4,000 military Soviet advisers were being shared with Syria, and Soviet engineers continued to maintain Egyptian military radar and equipment when, in 1973, Sadat launched the 6 October 1973 war with Israel.
Split into simpler sentences: Nevertheless, up to 4,000 military Soviet advisers were being shared with Syria, and Soviet engineers continued to maintain Egyptian military radar and equipment during the October War. In 1973, Sadat launched the 6 October 1973 war with Israel.