although anglo-french skirmishes over their american colonies had begun Process_start with what became Becoming the french and indian war in 1754 , the large-scale conflict Hostile_encounter that drew Motion in most of the european powers was centered Placing on austria 's desire to recover silesia from prussia .

after a vain protest by the czechoslovak government against action in breach of the interim agreement Agree_or_refuse_to_act , they attacked Attack the part of cieszyn silesia held Hold by polish forces to prevent Preventing_or_letting elections Choosing to the polish sejm in the disputed territory and the local population 's contributions to the polish army .