I found a few links via

[4plexowner]

I found a few links via Google

Here’s a chronology from http://motlc.wiesenthal.com/site/pp.asp?c=ivKVLcMVIsG&b=476131:

Jan 18, 1943 Second wave of deportations. Beginning of armed resistance
Apr 19, 1943 Final liquidation of Ghetto begins. Beginning of Ghetto uprising
May 16, 1943 Jrgen Stroop declares:
“The Jewish Quarter of Warsaw is no more!” Resistance actually continues sporadically.

This site, http://www.ujc.org/content_display.html?ArticleID=22880 , says

On April 18, 1943, as the German army marched in to liquidate the Warsaw Ghetto, a few hundred Jewish Resistance fighters, armed with pistols, rifles and homemade Molotov cocktails, confronted the Nazi soldiers and held them at bay for almost a month.

~

Looks like I should have said one month instead of four