When was ben franklin making bifocals

At the beginning of the war, why was hitler allowed to continue his aggression without resistance from other european countries

What role and side did italy fight on during world war 1? why did they change sides? write this in your own words.

How did the construction of the erie canal improve transportation in the united states in the 1820s? a. the canal connected the great lakes to the mississippi river. b. the canal connected the great lakes to the ohio river. c. the canal connected the atlantic and pacific oceans. d. the canal connected the great lakes to the atlantic ocean.