US Troops Join Parade In London's Trafalgar Square

The video covers Soldier Week in London, highlighting a parade showcasing American military strength. The event, attended by a large British crowd, featured a march past Trafalgar Square and a salute from Lieutenant General Lee. The British public, known for their reserve, warmly received the American soldiers, acknowledging their role as comrades in the upcoming struggle. The video concludes with a salute to the American soldiers as they await zero hour.

What does the phrase 'Comrade in arms' imply in the context of the text?

What does the term 'zero hour' refer to in the context of the American soldiers?