The correct term is decided to join.
He didn't join a group before the army, he decided he hated Jews because they differed from him and joined the army.
Joined, as in I joined the karate dojo.
"Joined" is the past participle of join, as in "I have joined the group."
The past tense for "join" is "joined".
The past tense of join is joined.
joined, join, join
None of them has still joined Luffy's crew. But Silvers Rayleigh is not gonna join the crew. Whether Jinbei joins or not will be decided in Chapter number 649.
neither joined neither, because it wasn't just England who joined them, it was the whole of Britain. England is not a fully fledged country as it doesn't have it's own government. Get your facts right. And Britain joined France.
The past simple of "join" is "joined."
Earth day is celebrated on April 22 each year. Anyone can decide at any time if they choose to join the celebration.
The past perfect tense of join is had joined.
No country attacked the US before they joined WW1, but the US's allies such as France and Britain were attacked and at war with Germany, so the US decided to support their allies and join the war. The sinking of the British/ American ship "The Lusitania" was a trigger for the US to join the war.