The RCMP was not correct.
As this is you matrimonial home you both had the right to occupy the home.
And that is the case until matters are resolved regardless of whose name is ***** ***** I am sorry that the office did not know the law and that is unusual as they usually do.
I don't know the law in the US but I doubt you have any right to change the locks in the US property. You certainly don't have that right here.
The court in Canada cannot make any order about assets outside of the jurisdiction but it can give you more assets from inside the jurisdiction to make up for the loss of assets outside the jurisdiction.
The court in Canada can make an order requiring your spouse to return your personal items.
This can be part of your reply that you will put in after you get served with the divorce application. You will need to deal with the division of assets and this can all be included.
But what your lawyer most likely told you is that after a one year marriage you are not going to be entitled to any assets that your spouse acquired before the marriage and likely not any he acquired after the marriage unless you contributed to them.
The general idea of sharing the value of the assets does not apply after a one year marriage.
It may be that he will have to pay you some spousal support but that would not go on for more than six months to a year because the marriage was so very short.
And given you left the house and it is your spouse's house and the marriage was so short at this point in time there is no likelihood of you being granted exclusive possession of the home. Had you not left you could have remained in the home until the issues were resolved but not after that.
I am sorry this has happened to you and I know what I've explained is not what you want to hear but telling you what you want to hear will not help you.