The situation remained as it was until 1973, when Egypt managed to recover the Sinai desert in what was called the War of Transit.
AFAIK the peace treaty was signed in 1979 (same year as Iran's revolution) and it takes until 1982 for Egyptians to take Sinai desert back.
All this, and there was no presence of Iran as a military force in the region until 1979
Actually Iran didn't have any serious military presence outside Iran until early 2000's.
You see after the revolution in 1979 since Iran booted US out and the tensions started growing there was an 8 year war which is the largest land battles after WWII until today. So from 1980 to 1988 Iran is defending against a full invasion and Iranians are practically defending against about 80 countries while Iran is abandoned by everyone.
It is also worth mentioning that Iran didn't have any military infrastructure in those days. It was so bad that Iranians couldn't even build bullets for their guns let alone build any advanced equipment (radars, missiles, rockets, aircraft, naval units) or even maintain stuff they already owned back then like the manned planes.
After the war ends and Iran emerges victoriously, there is about a decade of construction which brings us to 2000's and Bush's dream of invading Iran; as general W.K. Clark said the order they received was to
destroy 7 countries in 5 years (Iraq, Syria, Lebanon, Libya, Somalia, Sudan & Iran) to destabilize the region; and hence the Iran's serious military presence and US defeat years later.
That religious group in Lebanon (Hezbollah) posed a threat on the northern borders of Israel, since Iran was providing them with weapons
The Lebanese resistance was formed in early 80's after their country was occupied in order to liberate those parts.
During this time Iran was already at its own war as I explained above and was starved for weapons since literary nobody sold Iran anything and until then there was no infrastructure to build anything domestically either. Don't look at now that Iran is a big exporter of most advanced weapons, that took decades to build.
In fact despite what the media has always said, what Iran supply its allies with has not been weapons, but its the ideology. The simple ideology of defense, resistance and self reliance. Which is why Yemenis who are in the worse blockade in history have advanced missiles and drones. They built it themselves.
but Syria has not been able to date to recover the occupied Shebaa Farms since 1967.
Well complete victory has not yet been achieved against the occupiers. After all Palestine is not yet liberated.
The main problem between Israel and Iran began when the Iranian nuclear intentions were discovered,
I disagree because apart from what is reported in the media, everyone knows what the real intentions of Iran's nuclear program is. It is a peaceful program for hundreds of peaceful benefits of nuclear science.
- Every intelligence agency like CIA have already confirmed that Iran does not have a nuclear weapons program. Just google CIA director statements and you'll find in multiple occasions over the years this was approved.
- International Atomic Energy Agency has had most of its inspections from Iranian facilities, at some point it was as high as 90% of their inspections and they are supposed to inspect the whole world!!! They have approved everywhere that Iran does not have a nuclear weapons program.
- To top it all, Iran's supreme leader as the highest official who makes the final decisions in major matters and his words don't change since unlike Western Democracies the person doesn't change every couple of years! He considers WMDs that includes nukes haram, which is the highest way of prohibiting its manufacturing.
The reason why nukes are highlighted in the media is because they are scarier and it helps with Iranophobia strategy. They can't just tell the truth like saying "Iran has the most sophisticated air defense that has made the country impenetrable and we want that to go away so we can invade".
In fact the first draft of
JCPOA before 2015 included all these terms and only a tiny portion of it was about nukes! Which is why US pulled out of it in 2018, they wanted 2.0 version of it that targets Iranian defensive capabilities to finish the plan that Bush had in 2000's as I said earlier.
which became a regional threat to Israel, which was the only nuclear power in the region and therefore would be at the forefront of the cannon if an armed conflict broke out between Iran and the West,
Militarily speaking Iran doesn't need nukes to be an existential threat to Israel when a single ballistic missile can wipe out most of it.
Watch this excessive for example which is part of a bigger one held in the middle of Iran in an area that is twice the size of occupied lands. This is the simulated facility of equal size that builds nukes in Israel:
https://www.youtube.com/watch?v=CHc72QEoyAYAll it takes is only a single hyper-sonic BM to hit the target with its bunker busting warhead.
If some day Iran builds any nukes it would be in deterrence against United States that has a vast geography and is not a tiny land.
Iran is currently leading wars in Yemen and Iraq, but this is in the context of the conflict with the West and not directly with Israel.
Well, the context is actually about defending your home against the invaders. Both Iraq and Yemen have been invaded by foreign forces that happen to be or consist of Western countries.
Iraq conflict is mostly won and over while Yemen conflict is still ongoing with Yemenis resistance gaining increasing number of victories in every face off.