AFAIK, Ukranian men 18-60 stay behind to fight. Women and children evacuate to safety. There maybe a number of Ukranian women joining the fight as well, but the topic of gender equality is less likely of a priority at the moment. Personally, I wouldn't let that happen to any female members of my family given the same situation. When the smoke clears, they would want to come back because there's no place like home. It's natural human sentiment...