I have just finished watching the Anzac Day parade through Brisbane. On TV, because there is no way that I could manage to attend in person, though I remember parades back to about 1936, when the Light Horse veterans of the Boer War paraded with their splendid horses and with emu feathers stuck in their hats. I have read about the 1939 parade in Sydney, when the Italian veterans (who were out allies in WW 1) gave the Fascist salute when passing the Cenotaph in Sydney, which did not make the other marchers or the crowd at all happy. Nor did the swastika flag flying over the German consulate just around the corner. In fact, after some of the marchers had partaken of a liquid lunch in nearby pubs, they marched to the Embassy and threatened to burn down the building unless the swastika was removed. But this could not be done, as the building was vacant and even the caretaker could not be found. Even the police could not control the crowd. The fire brigade was called to remove the flag from the outside, but the firemen refused to extend their ladders. The men dispersed only when some very senior army officers climbed on the fire trucks and asked them to keep the peace.
Well, that was a long time ago. The Turks were brave fighters, but their behaviour towards prisoners - on the rare occasions when they accepted surrenders - was abominably barbaric. In view of subsequent Turkish generosity, we can let resentment about that fade into the past, but to deny that it was so is to falsify history. (I might add that Australians visiting Gallipoli are good for the Turkish economy.)
The parades have a different appearance in various cities and towns. Even twenty years ago or so, one country town had an Afrika Korps bugler for its memorial service. Other branches of the ex-servicemen's associations objected, but the local branch stuck to its decision: no bugler, no service at all. So that was one occasion that included a German ex-serviceman.
An account of this year's parade in Brisbane. Regular currently serving Australian units lead the march, different branches of the forces taking it in turns to lead. (I missed the beginning, so I did not see who led it this year.) Then follows a mixture of current servicemen, marching bands and old veterans, who naturally become fewer each year. After the Australians come the British: from the UK, Rhodesia (Zimbabwe) and South Africa. (A lot of South Africans have migrated to Australia; as British subjects, they take precedence over other refugees.) The New Zealanders generally mingle with the Australians; there are few of them, and they are distinguishable only by their hats. (No Canadians; there is hardly a good reason for Canadians to move to Australia, or vice versa.)
Then come the other Allies. Their numbers become fewer every year. The American generally lead; they used to be turned out very smartly, but now there are few of them and they are recognisable only by their banners and American Legion caps. (The march in Perth this year will be graced by the crew of an American warship in port.) Then the French; they used to be very smartly dressed, but now they show little evidence of their origin except for a few kepis and sailor's caps with red pompons. Then the Greeks, with standard bearers in full uniform of the Evzones. (Spelling?)
Then the Serbs, the rehabilitated Chetniks. It used to be a problem keeping the Serbians and Croatians apart during the march and away from each other's throats, but there were no Croatians this year. For the first time, there were also no longer any Dutch or Polish representatives, and there were few of the jeeps that used to carry the incapacitated and infirm in the parade. However, there is still a large contingent of Vietnamese - always well groomed, well dressed and looking very proud and formal, the standard bearers being beautiful girls in bao dais. (Naturally, the girls attract a lot of attention from the TV cameras.)
There is controversy over whether descendants and relatives should still be allowed to march as well. Especially children. Problem is that a lot of them do not "march"; they amble and straggle, dress disrepectfully, wear the medals on the wrong side, and do not know what to do with their hats and hands.
As for Germans and Japanese being allowed to march: sorry, but no, except for rare exceptions such as the one mentioned above. It is not that type of ceremony. It would be inappropriate. (Maybe at a later date, after combined operations in Iran or Afghanistan; an Australian unit was even assigned to protect a group of Japanese engineers in Iran.) Then there would be cases such as three Luftwaffe pilots who emigrated to Australia, joined the Royal Australian Air Force, and served in Malaya during the "emergency" there. Quite welcome to march as Australians; they had earned their credentials. (One had been with the KG100 pathfinders.)
Point is that it is an Australian ceremony, family, friends and a few invited guests only. (Chinese and Russians also do not march; the question as to whether they should be permitted has not arisen, as far as I know, but I think that the Korean War would have killed any such proposal.) It is also part of a religious ceremony, and way, way back Catholics, even Australian ones, were forbidden (by the church, not the authorities) to take part, except those under orders in a serving unit.