On the 11th November 1975, the Governor-General (the Queen's representative in Australia) Sir John Kerr, exercised his reserve powers under the Constitution to dismiss from office Prime Minister Gough Whitlam and his entire government and appoint Malcolm Fraser as caretaker Prime Minister.
Whitlam was the most socialist Prime Minister in Australian history, and his dismissal came largely because of scandals in his government, caused by a lack of respect and oversight for Australian law and constitutional practice. To be fair, the conservative Liberal-Country coalition opposition (headed by Malcolm Fraser) pushed some aspects of constitutional convention pretty hard themselves to help engineer the situation, but it all came to a head because Whitlam refused to do his constitutional duty as Prime Minister, and when it became clear he could not govern effectively, would not advise the Governor-General to dissolve Parliament for a new election. This is because Whitlam knew he would lose that election.
It was Australia's greatest ever constitutional crisis and it was the most dramatic day in Australian political history.
Once appointed Prime Minister, Malcolm Fraser's first action as Prime Minister was to resolve the supply crisis that would have meant the government ran out of money in a few weeks. His second was to advise the Governor-General of the need for an immediate election. This election took place on the 13th December 1975, when the conservative coalition defeated Labor in the greatest landslide in Australian history - the people's verdict on the Whitlam government.
Ever since 1975, much of the left wing in Australia have complained bitterly about these events - claiming them to be illegitimate, sometimes to the extent of calling the a coup d'etat. This is a nonsense - the Governor-General did exactly what the constitution required him to do - he gave Whitlam ample opportunity to resolve the crisis, and only stepped in when a situation developed that was critical and the only solution Whitlam could offer was absolutely illegal (he intended to order the Commonwealth Bank to release money to the government to cover its bills). He commissioned a new caretaker Prime Minister on express condition that this caretaker would advise an election so the matter could be put to the people - and that is what happened.
One key claim by these left wing conspiracists is that the Queen may have intervened in the matter - understand that in Australia, the monarchy is seen as the core of the constitution by most, though not all, conservatives, while the left tends to regard it as outmoded and part of a racist colonial past. This is not the monarchy, the United States rebelled against - in the time after that revolution (and in large part because of it) the monarchy evolved into a guarantor of the constitution and a brake on governments riding roughshot over the rights of the citizens). But the left were hoping the release of these letters (which they have pushed for, for years) would show that the Queen had been involved in the decision. Instead, they show that the Governor-General deliberately did not involve her.
Personally, I don't think it would have been as big a deal if the Queen had been involved as these left wing people do - but the evidence is now that she was not. It will be interesting to see what they make of it.
They are immune to reality.
I wish you a happy return to these times, especially the restoration of your gun rights as you had back then.