How did muslim expansion into india differ from expansion across north africa?

What happened as the result of a conflict between british troops and a colonial militia in massachusetts

1. america's first national road morse 2. joined lake erie with the hudson river cooper 3. steam-driven locomotive erie canal 4. allowed businesspeople to keep in touch with trends cumberland 5. telegraph code fulton 6. clermont telegraph

What is domino theory? how did domino theory impact the us involvement in the vietnam war