The Crusades had significant economic, social, and political impacts on Christians, Muslims, and Jews in the Middle Ages. For Christians in Europe, it increased the use of money and banking, led kings to establish tax systems, and strengthened the power of monarchs. It also exposed Christians to new foods, spices, and trade goods from the Middle East. For Muslims, the Crusades prompted the adoption of new military strategies and weapons while also uniting Muslims against the Christian invaders. For Jews, however, the Crusades exacerbated longstanding antisemitism and discrimination, resulting in massacres of Jewish communities and their eventual expulsion from England and France.