System for handling airborne threats in the military field, comprising an assignment of missiles for handling the airborne threats, said system comprising: - a first unit for retrieving information relating to the air picture of the environment of an area to be protected by said system, said first unit detecting airborne threats and transmitting position and kinematics information of the airborne threats; - a second unit for processing said information to deduce an engagement proposition therefrom, by firstly determining firing windows of the missiles on the basis of said information and then deducing the engagement proposition on the basis of said firing windows, said engagement proposition being an optimal missiles allocation plan, said engagement proposition specifying the missiles assignment and the firing instants of the missiles for handling the airborne threats; and - a third unit for implementing a step of approving the engagement proposition, the engagement being carried out in accordance with an engagement proposition approved by said third unit, said second unit including an automatic device for optimising a missiles allocation plan, comprising: • means for inputting data; • first means for determining, on the basis of the input data, time windows of availability and effectiveness relating to said missiles; • second means for determining, using said time windows, the optimal missiles allocation plan; and • user means using the optimal allocation plan determined by said second means, said second means comprising: - a first element configured to probabilise a solution space, namely said time windows, by generating continuous functions as a function of time that comply with said time windows; and - a second element configured to optimise the allocation plan on the basis of said solution space thus probabilised. - a first unit for retrieving information relating to the air picture of the environment of an area to be protected by said system, said first unit detecting airborne threats and transmitting position and kinematics information of the airborne threats; - a second unit for processing said information to deduce an engagement proposition therefrom, by firstly determining firing windows of the missiles on the basis of said information and then deducing the engagement proposition on the basis of said firing windows, said engagement proposition being an optimal missiles allocation plan, said engagement proposition specifying the missiles assignment and the firing instants of the missiles for handling the airborne threats; and - a third unit for implementing a step of approving the engagement proposition, the engagement being carried out in accordance with an engagement proposition approved by said third unit, said second unit including an automatic device for optimising a missiles allocation plan, comprising: • means for inputting data; • first means for determining, on the basis of the input data, time windows of availability and effectiveness relating to said missiles; • second means for determining, using said time windows, the optimal missiles allocation plan; and • user means using the optimal allocation plan determined by said second means, said second means comprising: - a first element configured to probabilise a solution space, namely said time windows, by generating continuous functions as a function of time that comply with said time windows; and - a second element configured to optimise the allocation plan on the basis of said solution space thus probabilised. said second unit including an automatic device for optimising a missiles allocation plan, comprising: • means for inputting data; • first means for determining, on the basis of the input data, time windows of availability and effectiveness relating to said missiles; • second means for determining, using said time windows, the optimal missiles allocation plan; and • user means using the optimal allocation plan determined by said second means, • means for inputting data; • first means for determining, on the basis of the input data, time windows of availability and effectiveness relating to said missiles; • second means for determining, using said time windows, the optimal missiles allocation plan; and • user means using the optimal allocation plan determined by said second means, said second means comprising: - a first element configured to probabilise a solution space, namely said time windows, by generating continuous functions as a function of time that comply with said time windows; and - a second element configured to optimise the allocation plan on the basis of said solution space thus probabilised. - a first element configured to probabilise a solution space, namely said time windows, by generating continuous functions as a function of time that comply with said time windows; and - a second element configured to optimise the allocation plan on the basis of said solution space thus probabilised.