The game Operation Overlord is a simulation that allows you to recreate three-dimensional battles set in the Second World War.
The rules are simple and intuitive and allow you to recreate battles where each man can make a difference between victory and defeat.
In order to play you will need a table and a ruler to measure movement and weapons ranges.

Authors notes
There are dozens of simulation games in the world. In more than twenty years I must have played more than one hundred. This gaming experience, together with my professional activity as a journalist, led me to write these rules which bases its philosophy on the following concepts:

Order cards
In any simulation all units do exactly what you expect of them: they charge when you want, they fire when you want and so on. Some games limit the choice with a dice roll, but the troops ALWAYS do what you tell them. In real life, it doesnŐt work like that. There is always one nervous private with an itchy trigger finger who ruins an ambush and men donŐt always assault when they should... All this is different with the introduction of the order cards: if you want to assault youŐll need an ASSAULT card.

Priority
Nearly all games have a fixed IGOUGO system. In this way veteran players can easily guess the results of a turn by looking at how the troops are set-up. In OO that is impossible. The card and priority system limits the order of the turn. If you have the right order but with a low priority you may not act in time. This partially simulates that hesitation that was sometimes fatal.

Awareness of the enemy
The classic "if one miniature can see another then he can fire" does not take into account the things that happen in a normal battle. The awareness rule partially simulates this situation.

Conclusions
I am convinced that the key to the success of a game lies in the fluidity of the game mechanism. Rules that are too complex, even if they increase the realism, can create slow and boring situations. For this reason I have chosen to balance both elements in favour of playability.