Well here we have God who is not even strong enough to prevent his Ark being taken.

1Sa 4:10-11 And the Philistines fought, and Israel was smitten, and they fled every man into his tent: and there was a very great slaughter; for there fell of Israel thirty thousand footmen.
And the ark of God was taken; and the two sons of Eli, Hophni and Phinehas, were slain.

He did manage to play some simple tricks on the Idol of the enemy

1Sa 5:2-3 When the Philistines took the ark of God, they brought it into the house of Dagon, and set it by Dagon.
And when they of Ashdod arose early on the morrow, behold, Dagon was fallen upon his face to the earth before the ark of the LORD. And they took Dagon, and set him in his place again.

More slaughter in the name of the Lord. Don't you just love the way he specifies that even babies young enough to be breastfed must be killed too. I wonder if the soldiers enjoyed that? I doubt it since most people share an instinct to protect the very young. Except for some very sick individuals and God himself.

1Sa 15:1-3 Samuel also said unto Saul, The LORD sent me to anoint thee to be king over his people, over Israel: now therefore hearken thou unto the voice of the words of the LORD.
Thus saith the LORD of hosts, I remember that which Amalek did to Israel, how he laid wait for him in the way, when he came up from Egypt.
Now go and smite Amalek, and utterly destroy all that they have, and spare them not; but slay both man and woman, infant and suckling, ox and sheep, camel and ass.