Turkey and Greece have been in conflict for a long time.
Above all, it is about the Cyprus issue - the Turkish president wants to see a two-state solution regarding the ethnically divided country in the Mediterranean.
In May this year, Erdogan said that Greek Prime Minister Kyriakos Mitsotakis "no longer exists" in his eyes and accused him of blocking the sale to Turkey of US fighter jets.
Threatens military action against Syria
In June this year, another conflict escalated - this time with Syria.
Erdogan threatened a military operation and announced that another step had been taken towards establishing a security zone along Turkey's southern border.
Hear SVT's Turkey correspondent tell about Erdogan's foreign policy pacifiers in the clip above.