Answer:
The Europeans' success in the first Crusade was due to a number of factors. Firstly, multiple European kingdoms united together, forming a powerful alliance to launch the Crusade. Secondly, Europe is geographically very close to Jerusalem, compared to other parts of the world, making it easier to travel there. Finally, the introduction of gunpowder from the Silk Road enabled the Europeans to make use of more advanced weapons and tactics in their campaign. Additionally, the Europeans were highly motivated by their religious beliefs, which gave them the courage and determination to fight for their cause.