If Sean was going to marry Dwight he would of course need to follow where Dwight is. If Dwight is still in Layton Lewis' Army which is still assigned at the border Sean also needs to stay at the border.
Ryzel was sure that the Hanes family can't bear to send Sean to the border or anywhere close to where the battlefield is.
Even if the place the guides are going to stay at is still far from the frontlines the prosperity of the planet of course can't be compared to the Capital Star.
Guides living in the Capital Star who don't want to leave married sentinels that were already in the capital or those who would be assigned to stay in the capital.
In the Federation the Armies would switch their jurisdiction with each other every ten years. The sixth army is currently assigned to the capital so the sentinels in the sixth army have higher chances to marry guides who wanted to stay in the capital.
