en_tn/2ki/03/26.md

swordsmen

"soldiers who fought using swords"; A sword is a flat-bladed metal weapon used to cut or stab.

break through

King Mesha wanted to go through the Israelite army with his men to go ask the King of Edom and his army for their help in the battle. ​

offered him as a burnt offering

King Mesha burned his son with fire until he died. He did this as an offering to the false god of Moab, Chemosh. (See: rc://en/ta/man/translate/figs-explicit)