/// <summary>
/// Unit the players attacking squads with the player defending squad.
/// </summary>
/// <param name="player"></param>
/// <returns></returns>
public async Task ReturnSquadsToBase(Player player)
{
var city = player.City;
var army = player.Army;
var squads = army.Squads
.Where(s => s.CityId != city.Id && s.CityId != null)
.ToList();
var defendingSquad = army.Squads
.Where(s => s.CityId == city.Id)
.SingleOrDefault();
foreach (var squad in squads)
{
await _squadService.UniteSquads(defendingSquad, squad);
await _squadService.DeleteSquad(squad, army);
}
}