Suggestion:
I propose the introduction of a "Guard Mode" feature that allows players to send troops to a designated "Ball" area, where these troops would automatically engage enemy units, operating similarly to the "march to attack" mechanic. Additionally, it would be useful to include options that let players determine the conditions under which their units return to the city. Some proposed options include:
Unit Count Selection: Allow players to choose the number of units that remain in combat versus those that return to the base.
Yellow HP Threshold: Enable players to set a specific HP level at which units will trigger a warning status (yellow) and prepare to withdraw.
Red HP Threshold: Allow players to define a critical HP level (red) at which units will automatically retreat back to the city.
This feature, reminiscent of mechanics found in games from the early 2000s, could provide a strategic advantage by enabling more efficient troop management during periods when players are unable to actively monitor their battles—such as during nighttime or while at work.