Here's a list of countries that Israel has bombed, both openly and covertly, since World War II, sorted by the date of the first known bombing action in each country:
Open and Covert Bombings Sorted by Date:
Egypt:
1948 (Operation Yoav during the 1948 Arab-Israeli War)
1956 (Suez Crisis)
1967 (Six-Day War)
1970s (various covert operations)
Jordan: 1948, 1967 (Six-Day War), 1970 (Black September)
Syria:
1948 (War of Independence)
1967 (Six-Day War)
1973 (Yom Kippur War)
1982 (Operation Peace for Galilee)
Post-2013 (against Hezbollah and Iranian targets)
Lebanon:
1948 (War of Independence)
1978 (Operation Litani)
1982 (First Lebanon War)
1993 (Operation Accountability)
1996 (Operation Grapes of Wrath)
2006 (Second Lebanon War)
Various dates post-2006 against Hezbollah
Tunisia: 1985 (Operation Wooden Leg)
Iraq:
1981 (Operation Opera - bombing of Osirak nuclear reactor)
Post-2014 (against Iranian and militia targets)
Sudan: 2009 (alleged strike on convoy)
Palestine:
1948-present (various conflicts, notably during Intifadas)
2008-09 (Operation Cast Lead)
2012 (Operation Pillar of Defense)
2014 (Operation Protective Edge)
2021 (Operation Guardian of the Walls)
2023-present (ongoing conflicts in Gaza)
Libya: 1986 (covert involvement in downing of Libyan airliner)
Iran:
2007 (alleged strike in Syria but targeting Iranian assets)
2018 (alleged covert operations)
Yemen: 2002 (alleged strike on convoy)
Gaza Strip (Hamas):
Numerous instances since the late 20th century, with significant operations in 2008, 2012, 2014, 2021, and ongoing since October 2023.
Additional Notes:
Open vs. Covert: The distinction between open and covert can sometimes be blurred. Operations might start covertly and later become publicly acknowledged or vice versa.
Sources: This information is drawn from:
Al Jazeera reports
Wikipedia entries on specific military operations
Posts on X (formerly Twitter) discussing historical actions
Various news articles and analyses from human rights monitors and conflict reports.
Please note, this list might not include every minor incident or completely covert operation, especially those still under secrecy or not fully acknowledged by official Israeli sources.