Most of your staff will be in relationships.
Many of them will be married.
All of them will will have loved ones.
If you want your team to put in the extra hours, to travel, to be away from their loved ones, then you need to look after those loved ones.
Invite them to company parties. Say thanks. Send chocolates. Be empathetic.
The difference between winning and losing can be something as small as a key team member being allowed by her husband to pull an all-nighter.
If you don’t look after the spouses, don’t expect them to let their better halves look after you.