One reason Texas joined the Confederacy was — Lincoln was elected president

Sam Houston supported secession

Texans wanted to abolish slavery

Union troops attacked Galveston

Athens was not justified in using the money and resources of the league to build its navy and attack other city-states; the reason why Athens was not justified was because it (Athens) was also a member of the body of Greek city-states—known as the Delian League—which had a lot of successes over the Persians. On the other hand, the members of the league can be blamed for their situation because they opted to leave the Delian League which was powerful because of the navy that was controlled by Athens; the decision of the city-states to leave the League, prompted Athens to forcefully subdue and control the city-states/members of the League.