Since satan was cast out of heaven he has been wagen war against everything that represent God and goodness on the earth (Matthew 16:23)his current game plan is to decieve as many people as possible into rebelling against God, so that they will also join him in the lake of fire,which is the eternal place of punishment prepared for him and his cohorts (mathew 25:41)to destroy the work of the devil on earth and to manifest the plan of God for mankind, God has chosen to raise an army to himself among men if you have surrender your life to christ you are part of this army. as a solder of God's army in jeremiah 5:20 God declare this words to you
though art my battle axe and weapons of war for with thee will breaking pieces the nation's, and with the will destroy Kingdom. the nation and the Kingdoms in the declaration are not just physical, they are spiritual. the Holy Spirit made it clear to us in ephesians 6:2 and also teaches us the weapon with which we wage war in God's army are not physical weapon. as a in God's army you need to take a clue from David who presented himself as God's battle axe and he he was mightily used by God to bring into captivity every thought and arrogance by goliath. it is interesting to note that even goliath as a huge as he was and as sophisticated as his weapons were,did not rely on his physical ability or weapons alone 1samuel 17:43 says.