Complex sentence: Almost immediately, the kingdom was simultaneously invaded by the Seljuks from Syria and the Fatimids from Egypt, although by showing himself ready and willing to defend his territory, Baldwin forced the Muslim army to back down without a battle.
Split into simpler sentences: Almost immediately, the kingdom was simultaneously invaded by the Seljuks from Syria and the Fatimids from Egypt. Showing himself ready and willing to defend his territory, Baldwin forced the Muslim army to back down without a battle.