Marines must request paternity leave within 25 days after the birth of the baby. If deployed, the commander can approve paternity leave within 90 days of deployment and can authorize it outside that time period for extraordinary circumstances.
An injury to a nail may result in the loss of the nail. As long as the nail bed itself wasn't damaged, a lost nail should eventually grow back. Healthy fingernails grow at a rate of about 0.10mm per day, but toenails are slower, growing at only about one half to one third of a fingernail's rate.
Most likely it takes about six months to grow back a fingernail, and about a year for a toenail. Sometimes less for some people. The base of your nail the roots are called the matrix it runs in a crescent along the finger, if you damage it the nail can grow back split in two, overlap, or come in deformed.