God’s big on passing down stories from generation to generation. Particularly stories that show new generations God’s faithfulness. Why? Because hearing another person’s testimony about something or Someone can be the single drop of gasoline that starts a fire in someone else. It’s one thing to know about God; it’s another to hear people tell of their firsthand experiences with God.
In Exodus 13 God establishes some reminders of how He freed he Israelites from slavery in Egypt and admonishes the people to pass those reminders on.
*Note: there is no mention of the actual Alamo in Exodus 13.