I'll have a go at answering this one too.

First I do not often list old Military items, but know that it is very tricky what you can and can't list - there seem to be continual changes. However you seem to have your head around that so I will assume that what you listed was within eBay guidelines. However do check that the items you are complaining about being listed on eBay while yours were removed are listed through eBay Australia and NOT through eBay USA or UK for example - there are different rules for different jurisdictions. I know you are new to eBay but the fact that you can see and buy them through eBay Australia does not mean they are listed through eBay Australia - if you have not done so, just check this out first.

However I can almost guarantee you that your items were not removed by eBay itself BUT because someone reported your items to eBay as breaking the listing rules. eBay does not have the staff to constantly monitor listings - it relies on others reporting items listed wrongly. Have a look - every item listing has an option - Report Item.  Looking at your listings and reading the guide you posted the other day, it is clear you have major issues with many sellers already here on eBay, in regards to particular items they are selling. I have no way of knowing who is right and who is wrong, but when the wording on your listings accuses others of what amounts to, at the best, mis-representation,  is it surprising that they would want to get your competing items removed? I am not condoning this attitude, merely pointing out what seems to me to have likely happened.

I admit is it very frustrating that eBay will not tell you exactly WHY your items have been removed but that is what you will find you get from eBay.

Obviously you are a knowledgeable person, with some nice items to sell. My advice would be to go along quietly, sell some other items, and when you have accumulated some Feedback as a Seller, you might think about revisiting those particular items. However if it was ME, I would delete most of the info on your listings that suggests other eBay sellers may be  mis-representing items. It only annoys them and encourages them to report your items. Get some good Feedback (as a Seller), price your items attractively and I am sure you will make some good sales. JMO.