In some English Bible translations, the name of Yahweh Tseva'ot (or Sabaoth) is simply translated as the Lord Almighty. It's usually Lord written in lower case letters, as opposed to LORD written in small capitals, which is how they usually translate Yahweh alone. But if you look up sābā' in a Hebrew dictionary, its original meaning is not might or strength. Throughout the Old Testament the word is most commonly translated as armies, troops, battle, war or service - including the description of the Levites service towards God.
When the pre-teen David approaches the giant Goliath (1Sam 17: 45) he says, "You come to me with sword, spear and shield, but I come to you in the name of Yahweh Tsevao't, the Lord of Hosts, the God of the armies of Israel." (Elohim maʿărāḵâ ) Perhaps because David went on to be a military man who fought in many battles, we see that God often speaks to him - all through the books of Samuel, Kings and Chronicles - while calling Himself Yahweh Tseva'ot, the Lord of Hosts.
A prophet called Micaiah has a vision where he sees God sitting on the throne (1 Kings 22: 19) with the "hosts of heaven" standing around Him. With the prophet Isaiah's vision of God (Isaiah 6: 3) he hears the cry, "Holy, holy, holy is the Lord of Hosts. The whole earth is full of His glory."
Although some Bibles translate Yahweh Tseva'ot as Lord Almighty, it's clear the name isn't referencing His inherent strength, but rather the fact that He has armies of angelic hosts to do His bidding. He is ready to fight for justice and righteousness.
Psalm 24 describes the King of Glory and calls Him (vs 10) the Lord of Hosts. Psalm 46 says twice that the Lord of Hosts is our refuge. Throughout the Psalms, He is often called Yahweh Tseva'ot or Elohim Tseva'ot. The implication is that He is willing also to fight for us, no matter what enemies we're facing.
It is Yahweh Tseva'ot who says through the prophet Haggai that He is going to shake the nations. The name appears all through, Isaiah, Jeremiah, Zechariah and most of the minor prophets. At a time when Israel and Judah were falling apart, while they were being besieged by the foreign powers that would later take them into exile, God's prophets were reminding the people that they were rebelling against the Lord of heaven's armies. He wanted to fight for them, but instead they forced Him to fight against them.
He's still the Lord of Hosts today; no matter what is happening in our world, He is still the Lord Almighty.