Israel and Iran have been enemies for decades — but this is their most sustained direct fighting ever. Here’s how a shadow war erupted into an overt conflict.

The Lebanese militant group Hezbollah was long considered Iran’s first line of defense in case of a war with Israel.

Top Lebanese officials said Monday they want to prevent the country, which is still recovering from the recent Israel-Hezbollah war, from being dragged into the ongoing conflict between Israel and Iran.