Deployment is tough on the entire family even in the best of circumstances. Hardship is part of what makes the sacrifice of armed services members and their families such an honorable calling. But a military family can stay connected to each other before, during and after deployment.
Come up with a mutually agreed upon plan for marital intimacy (i.e. Skype dates, read & discuss the same daily devotional, plan creative alternatives to physical intimacy). Most importantly, resolve any tensions in your relationship. Prolonged separation can make marital problems worse and create greater vulnerability to temptation while apart. Pray with and for each other often.