In the present work the writer makes an attempt to interpret the genesis and evolution of ancient Greek fortifications in Attica during the Classical and Hellenistic periods, as well as to collect information based on the evidence. In the first part of this work the writer defines the goal of the effort put henceforth and begins to reveal and ascertain the previous works by notable authors which have dabbled in this matter before. This work is by no means the product of parthenogenesis, as the writer has relied heavily on the works of his predecessors who visited the sites themselves. One of the objectives of this work is the gathering and translation of existing works into Greek. The writer then examines the way war was waged during those times, as well as the nature of the fortifications used, thus creating a volume of information to be used to cross examine the later finds. In the second part of this work, in the Analysis part, the goal is Attica specifically, that is to say its geography, geology, economy, communication and finally the land itself as a battleground. It is at this point that evidence has been gathered and compiled, creating a volume of information which contains the name of each site, its location on the land of Attica, a description of it and a possible explanation as to its raison d'être. Finally, an attempt is made to provide a timeframe in which each site was first constructed, wherever such an attempt is possible. In the third and final part of this work, that of the Synthesis, an attempt is made to interpret Attica’s fortification history, by examining and defining the contributing factors of the aforementioned fortifications. After that, a table is formed, containing all examined sites and finally, a map is presented, on which lie the sites which the writer could find adequate proof to place them.