Yees family is here but he married a Syrian woman. I wonder if and when he returned to Syria to visit her family.
The accounts on the dates he was in Syria are vague because of the lack of military records, unfortunately. And if he went to Syria to marry, it's worth noting that usually these Middle eastern marriages are arranged.
If his parents are still Christian then they wouldn't be consulted; the arrangement in that case would likely be between the Syrian woman's family and a cleric Yee was associated with. Another one in the chaplain corps, perhaps, or maybe a cleric at one of Seattle's mosques?