Yehoshua told meraglim to go into Ai and see how the people there would behave if Bnei Yisrael conquer it.

Lets see what will happen if we conquer it!

Yehoshua only told 3000 soldiers to go into Ai because he thought Ai was weak.

The Jews did not know why they lost. Hashem gave Yehoshua a message.

Achan stole something precious and some valuable metals like gold and silver.

HA,HA,HA!NOW I’LL BE RICH!

Because Achan did not obey Hashem , he was killed.

Yehoshua was thinking then thought of a plan. He told thirty thousand men to wait behind the walls of Ai. Meanwhile he and a smaller army would attack.

Ai started to attack the Jews.

Lets attack!

The Jews pretended to escape and the king of Ai ran after them that meant no one was protecting the city.

Lets go

after them!

Go, go, go!

Yehoshua lifted his javelin to show a sign to the Jews that were waiting to into Ai and set it on fire.