This is called the Columbian Exchange: the exchange of species and populations between the Old and the New World, including some diseases, plants as tomato and potato and animals.
Answer: embarking on pilgrimages.
A pilgrimage is a journey in search of spiritual meaning. In Christianity, the Holy Land is a particularly important site of pilgrimage, as this is the location with the closest connection to the life of Jesus Christ.
However, pilgrimages were also made within Europe to places such as Rome. Other popular sites included the Santiago de Compostela Cathedral in Spain (along the <em>Way of St. James</em>), Maastricht, Aachen and Kornelimünster (the <em>Pilgrimage of the Relics</em>) and Canterbury Cathedral (as described by Chaucer).
The next time that Hanukkah begins on Christmas Day is in 2024.
The land structure, being flat or with hills. Could provide a lack or increase of defense, hills being used as a shield. Bodies of water have been used to hide out, but also provide drink to soldiers, foggy weather can make it difficult to see the enemy.
