Currently, no, if u want to save your mechs i would send them away right before you get attacked. If the attack is 2 hours out, send them somewhere that will take them about 2 and a half hours to go there and back. If the attacks happen while you are sleeping then right before you go to bed figure out about how many hours you are going to sleep, then find a city to attack that will take about half of your sleep time to get there (pick a weak city that has no mechs lol), by the time your mech gets back you will be awake and even if someone attacked you, they wont destroy your mechs. To figure out how long it will take your mech to get there go to your map and find a city. Move your mouse over the city and at the bottom left hand corner it will say "dist. 54.52" for example. To figure out how long it will take for you mech to get there, find your mech's speed then take the distance and divide it by your mech's speed. So if I had a Puma, his speed is 15, so I would take 54.52 and divide it by 15 to get 3.63 hours. Please note that if you send your mechs in a group, they will travel at the speed of the slowest mech, so if you have a Puma and a Raptor, they will travel at a speed of 10, because that's the raptors speed.