This is not the first operation that Turkey has been doing. I believe this should be 3rd or 4th one. In previous ones, there weren't a refugee strike through borders.
"Turkish guards at the border with Syria are indiscriminately shooting at and summarily returning asylum seekers attempting to cross into Turkey, Human Rights Watch said." https://uk.reuters.com/article/uk-mideast-crisis-syria-turke... This occurred during Operation Olive Branch.
