This final work will try to describe the meaning and purpose of infantry reconnaissance operations. In the first fart of the work a short review will be given on reconnaissance and reconnaissance units trough history. After that, the definition of recconnaissance, reconnaissance objectives and reconnaissance main tasks. Further, the organisation of reconnaissance units, obligations and dutys of staff and the planing process will be shown. In the main part of this work forms, techniques and methods of reconnaissance will be shown and described. Observing and observation posts thogether with characteristics of reconnaissance vehicles are also included in the main part. Furthermore, it will be explained how diffrend type of weather and terrain can have impact on reconnaisance units. In the last part, before the conclusion and list of literature, it will be explained how can reconnaissance and other units cooperate when conducting reconnaissance operations. The purpose of this final work is to point out the importance of reconnaissance units and tasks throughout the history and in modern warfare.