Seige engines were used before historical times. As fortifications improved, starving out cities up to the 5th Century BCE was lengthy and costly, so emphasis switched ot shortening this with organised seige engines. The Spartans in their seige of Messenia in the 460s BCE had to call in the Athenians to help.
So there was no 'first'. Looking for firsts, biggests, longests etc is a hazardous occupation, as somoe will always be able to trump you.
A well known innovator was was Dinysios I (Tyrant of Syracuse); Demetrius was given the nickname 'Beseiger'.
It was made in 1967
The Confederates under General G.P.T. Beauregard, laid first siege to fort Sumter.
Mendeleev from Russia was the first person to organize the periodic table of the elements
The first attempt to organize labor in the US was the Federation of Organized Trades and Labor Unions. It organized workers in 5 cities in 1834.
The Roman Army about 200 BC.
A battering train is a train of artillery for siege operations.
to equip, retain, train, and organize forces
a set of artillery and other equipment for a siege, together with troops and transport vehicles.
Train
It was made in 1967
First Siege of Missolonghi happened on 1822-12-31.
They attacked in Italy, but did not have a siege train to attack the city itself with.
to equip, retain, train, and organize forces
The hard style large train cases are the most popular train cases. Train cases have become one of the most popular ways for women to organize their makeup.
The Confederates under General G.P.T. Beauregard, laid first siege to fort Sumter.
ANSWER The Confederate forces laid first siege to Fort Sumter, starting the conflict.
Which ancient culture was the first to organize medical care and set up some of the first hospitals