The art and architecture of the mycenaean civilization reflects a preoccupation with because, unlike crete, it lacked the natural defense of a surrounding sea.

Arms and fortification.

A Mycenaean palace was surrounded with huge fortified walls made up of stones said to be so massive that only Cyclopes (legendary giants) could have moved them into place.  Those fortress walls could reach over 40 feet in height and be over 20 feet thick.

The Mycenaean military had all sorts of weapons, as discovered in archaeological research as well as depicted in Mycenaean art.

Yea alexander graham bell